OTANI Naoki
Faculty of Science and Engineering Department of Electronics
Professor
Last Updated :2021/08/05

Researcher Profile and Settings

Research Interests

  • semiconductor optical device
  • semiconductor optical properties
  • compound semiconductor
  • carbon nitride
  • quantum well
  • quantum dot
  • organic-inorganic hybrid material
  • sol-gel
  • dye-sensitized solar cell

Research Areas

  • Nanotechnology/Materials/Optical engineering and photonics
  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering)/Electronic devices and equipment

Research History

  • 1994-2001 Research on ultra-fast optical switching devices and photo-physics of semiconductor nano-structures
  • 2001-2005 Research on semiconductor lasers and and photo-physics of semiconductor nano-structures

Academic & Professional Experience

  • Faculty of Science and Engineering, Doshisha University, 2011/04 - 2014/03
  • Doshisha University, 2005/04 - 2011/03
  • ATR Laboratories, Visiting researcher, 1994 - 2001
  • Communications Research Laboratory, Leader of research group, 2001 - 2005

Academic Degrees

  • Doctor of Engineering, Hokkaido University
  • Master of Engineering, Hokkaido University

Association Memberships

  • THE JAPAN SOCIETY OF APPLIED PHYSICS

Published Papers

  • Anomalous photoluminescence properties of emissive polymer originating from modulated chemical structures affected by antioxidant effect of natural β-carotene
    Yuuki Magata, Naoki Ohtani
    Japanese Journal of Applied Physics, IOP Publishing, 60(5)051003 - 051003, 01 May 2021, English, Research paper (scientific journal)
  • Study of isolation method of green fluorescent pigments contained in cherry tomatoes using column chromatography
    A. Noma, N. Ohtani
    Japanese Journal of Applied Physics, 59(SC)SCCA09-1 - SCCA09-6, Feb. 2020, English, Research paper (scientific journal)
  • Fabrication and Characterization of Carbon Nitride Fluorescent Material Using Annealed Melamine
    K. Wada, N. Ohtani
    Physica Status Solidi (b), 256(6)1800521 , Jun. 2019, English, Research paper (scientific journal)
  • Fabrication of aluminum and gallium codoped ZnO multilayer transparent conductive films by spin coating method and discussion about improving their performance
    Y. Morita, N. Ohtani
    Japanese Journal of Applied Physics, 57(2)02CB03-1 - 02CB03-6, Feb. 2018, English, Research paper (scientific journal)
  • Enhancement of radiative efficiencies of near-ultraviolet organic light-emitting diodes by localized surface plasmon resonance effect
    A. Matsuoka, A. Emoto, N. Ohtani
    Journal of Physics, 647(1)012058 , Oct. 2015, English, Research paper (scientific journal)
  • 半導体超格子における電界ドメインの非線形ダイナミクス
    M. Hosoda, N. Ohtani
    Oyo Butsuri, 84(6)508 , 2015, Japanese
  • Experimental study on the condition of formation of electric-field domains in multiple finite superlattices
    N. Ohtani, S. Noma, K. Akahane, M. Hosoda, K. Fujita
    Microelectronics Journal, 40(4-5)818 - 820, Jan. 2009, English, Research paper (scientific journal)
  • Electric-field-direction dependence of carrier injection into high-energy states in asymmetric GaAs/AlAs multiple-quantum wells embedded in an n-i-n diode
    H. Kitamura, S. Hiratsuka, M. Hosoda, K. Akahane, and, N. Ohtani
    Journal of Physics, 109012021 , Apr. 2008, English, Research paper (scientific journal)
  • Improvement of radiative efficiency and wavelength-tuning by TPD-doping in organic light emitting diode using Poly [methylmethacrylate-co- (7- (4-trifluoromethyl) coumarin acrylamide)] (PCA)
    M. Haishi, T. Yamamoto, M. Murata, and, N. Ohtani
    Journal of Physics, 109012011 , Apr. 2008, English, Research paper (scientific journal)
  • Numerical method for coherent electron dynamics with potential-dependent effective-mass distributions in semidonductor heterostructures
    T. Ando, Y. Ohtake, N. Ohtani
    Physical Review E, 73(6)066702 , Jun. 2006, English, Research paper (scientific journal)
  • Metamorphic InGaAs/AlAsSb quantum wells grown on GaAs substrates for intersubband devices operating toward short-wavelength region
    S. Gozu, A. Ueta, K. Akahane, N. Yamamoto, N. Ohtani, M. Tsuchiya
    Electronics Letters, 42(10)601 - 602, May 2006, English, Research paper (scientific journal)
  • Interface states of AlSb/InAs heterointerfacee with AlAs like interface
    S. Gozu, K. Akahane, N. Yamamoto, A. Ueta, T. Ando, N. Ohtani
    Japanese Journal of Applied Physics, 45(4)3540 - 3543, Apr. 2006, English, Research paper (scientific journal)
  • Circular polarization switch by using photo-chemically etched silicon
    N. Yamamoto, N. Ohtani, T. Matsuno, H. Takai
    Japanese Journal of Applied Physics, 44(7A)4749 - 4751, Jul. 2005, English, Research paper (scientific journal)
  • Over 1.3 mu m continuous-wave laser emission from InGaSb quantum-dot laser diode fabricated on GaAs substrates
    N Yamamoto, K Akahane, S Gozu, N Ohtani
    APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 86(20)203118 , May 2005, English, Research paper (scientific journal)
  • Photoluminescence from high Gamma-electron subbands and intersubband electroluminescence using X-Gamma carrier injection in a simple GaAs/AlAs superlattice
    C Domoto, T Nishimura, N Ohtani, K Kuroyanagi, PO Vaccaro, T Aida, H Takeuchi, M Nakayama
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, INST PURE APPLIED PHYSICS, 41(8)5073 - 5077, Aug. 2002, English, Research paper (scientific journal)
  • Photocurrent and photoluminescence affected by G-X electron transfer in type-I GaAs-AlAs superlattices
    H. Mimura, M. Hosoda, N. Ohtani, K. Yokoo
    Japanese Journal of Applied Physics, 37(3B)1650 - 1653, Mar. 1998, English, Research paper (scientific journal)
  • Avalanche breakdown mechanism originating from G-X-G transfer in GaAs/AlAs superlattices
    M. Hosoda, K. Tominaga, N. Ohtani, K. Kuroyanagi, N. Egami, H. Mimura, K. Kawashima, K. Fujiwara
    Applied Physics Letters, 71(19)2827 - 2829, Nov. 1997, English, Research paper (scientific journal)
  • Anomalously large negative differential resistance due to G-X resonances in type-I GaAs/AlAs superlattices
    M. Hosoda, N. Ohtani, K. Tominaga, H. Mimura, T. Watanabe
    Physical Review B, 56(11)6432 - 6435, Sep. 1997, English, Research paper (scientific journal)
  • Observation of Gamma-X resonances in type-I GaAs/AlAs semiconductor superlattices: Anomaly in photoluminescence
    M Hosoda, H Mimura, N Ohtani, K Tominaga, K Fujita, T Watanabe, H Inomata, M Nakayama
    PHYSICAL REVIEW B, AMERICAN PHYSICAL SOC, 55(20)13689 - 13696, May 1997, English, Research paper (scientific journal)
  • Stark ladder photoluminescence of X states in GaAs/AlAs type-I superlattices
    N. Ohtani, M. Hosoda, H. Mimura, K. Tominaga, T. Watanabe
    Japanese Journal of Applied Physics, 36(3B)1184 - 1187, Mar. 1997, English, Research paper (scientific journal)
  • Influence of G-X resonances on G ground state electron occupation in type-I GaAs/AlAs superlattice
    M. Hosoda, K. Tominaga, N. Ohtani, H. Mimura, M. Nakayama
    Applied Physics Letters, 70(12)1581 - 1583, Mar. 1997, English, Research paper (scientific journal)
  • Investigation of X levels in GaAs/InAlAs strained superlattices
    K. Kuroyanagi, N. Ohtani, N. Egami, K. Tominaga, M. Ando, M. Nakayama
    Nonlinear Optics, 18(2)261 - 264, 1997, English, Research paper (scientific journal)
  • Evidence for various higher-subband resonances and interferences in a GaAs/AlAs asymmetric quadruple-quantum-well superlattice analyzed from its photoluminescence properties
    Keisuke Hata, Makoto Hosoda, Kouichi Akahane, Naoki Ohtani
    PHYSICAL REVIEW B, AMER PHYSICAL SOC, 95(7)075309-9 , Feb. 2017, English, Research paper (scientific journal)
  • Improvement of photoelectric conversion efficiencies of dye-sensitized solar cells consisting of hemispherical TiO2 films
    Shogo Izumi, Ayame Mizuno, Naoki Ohtani
    PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 14 NO 6, WILEY-V C H VERLAG GMBH, 14(6)1600186 , 2017, English, Research paper (international conference proceedings)
  • Characterization of dopant density dependence on transmittance and resistance of ZnO films fabricated using spin-coating method
    Yusuke Morita, Akira Emoto, Naoki Ohtani
    MOLECULAR CRYSTALS AND LIQUID CRYSTALS, TAYLOR & FRANCIS LTD, 641(1)106 - 110, 2016, English, Research paper (scientific journal)
  • Fabrication of silica glass thin films containing organic emissive materials and application to multi-layer organic light-emitting diodes
    Ryo Nakagawa, Yusuke Jitsui, Akira Emoto, Naoki Ohtani
    MOLECULAR CRYSTALS AND LIQUID CRYSTALS, TAYLOR & FRANCIS LTD, 641(1)111 - 118, 2016, English, Research paper (scientific journal)
  • Improved Photoluminescence Lifetime of Organic Emissive Materials Embedded in Organic-Inorganic Hybrid Thin Films Fabricated by Sol-Gel Method Using Tetraethoxysilane
    Naoki Ohtani, Masashi Tonoi
    MOLECULAR CRYSTALS AND LIQUID CRYSTALS, TAYLOR & FRANCIS LTD, 599(1)132 - 138, Aug. 2014, English, Research paper (scientific journal)
  • Synthesis of uniform and high-density silver nanoparticles by using Peltophorum pterocarpum plant extract
    Matheswaran Balamurugan, Natesan Kandasamy, Shanmugam Saravanan, Naoki Ohtani
    JAPANESE JOURNAL OF APPLIED PHYSICS, IOP PUBLISHING LTD, 53(5)05FB19 , May 2014, English, Research paper (scientific journal)
  • Structural and optical studies of pure and Ni-doped ZnO nanoparticles synthesized by simple solution combustion method
    Murugesan Silambarasan, Shanmugam Saravanan, Naoki Ohtani, Tetsuo Soga
    JAPANESE JOURNAL OF APPLIED PHYSICS, IOP PUBLISHING LTD, 53(5)05FB16 , May 2014, English, Research paper (scientific journal)
  • Structural and photoluminescence studies of Ni-doped ZnO nanoparticles synthesized by solution combustion method
    Murugesan Silambarasan, Shanmugam Saravanan, Naoki Ohtani, Tetsuo Soga
    Palliative and Supportive Care, Cambridge University Press, 1584(1), 02 Jan. 2014, English, Research paper (scientific journal)
  • Synthesis of uniform and high density silver nanoparticles by using peltophorum pterocarpum flower extract
    Matheswaran Balamurugan, Shanmugam Saravanan, Naoki Ohtani
    Palliative and Supportive Care, Cambridge University Press, 1584(1), 02 Jan. 2014, English, Research paper (scientific journal)
  • Structural and photoluminescence studies of ni-doped ZnO nanoparticles synthesized by solution combustion method
    Murugesan Silambarasan, Shanmugam Saravanan, Naoki Ohtani, Tetsuo Soga
    Materials Research Society Symposium Proceedings, Materials Research Society, 1584, 2014, English, Research paper (international conference proceedings)
  • Improvement of the EL efficiency of the Inorganic-Organic Light-Emitting Diodes by Rubrene-Doping
    Ryo Nakagawa, Yusuke Jitsui, Naoki Ohtani
    2014 21ST INTERNATIONAL WORKSHOP ON ACTIVE-MATRIX FLATPANEL DISPLAYS AND DEVICES (AM-FPD), IEEE, 85 - 87, 2014, English, Research paper (international conference proceedings)
  • Bulk heterojunction organic solar cells fabricated by mist deposition method by ultrasonic oscillation
    Shogo Izumi, Akira Emoto, Naoki Ohtani
    2014 21ST INTERNATIONAL WORKSHOP ON ACTIVE-MATRIX FLATPANEL DISPLAYS AND DEVICES (AM-FPD), IEEE, 259 - 260, 2014, English, Research paper (international conference proceedings)
  • Fabrication of organic-inorganic hybrid thin films by sot-gel process using tetraethoxysilane
    Keisuke Hata, Naoki Ohtani
    2014 21ST INTERNATIONAL WORKSHOP ON ACTIVE-MATRIX FLATPANEL DISPLAYS AND DEVICES (AM-FPD), IEEE, 93 - 94, 2014, English, Research paper (international conference proceedings)
  • Fabrication and optical characterization of organic-inorganic hybrid films using ultraviolet-curable silsesquioxanes
    Hironori Akiyama, Naoki Ohtani
    Japanese Journal of Applied Physics, 53(2)02BC18 , 2014, English, Research paper (scientific journal)
  • Excitonic Rabi oscillations in self-assembled quantum dots in the presence of a local field effect
    Kenta Asakura, Yasuyoshi Mitsumori, Hideo Kosaka, Keiichi Edamatsu, Kouichi Akahane, Naokatsu Yamamoto, Masahide Sasaki, Naoki Ohtani
    PHYSICAL REVIEW B, AMER PHYSICAL SOC, 87(24), Jun. 2013, English, Research paper (scientific journal)
  • Transmission electron microscope observation of organic-inorganic hybrid thin active layers of light-emitting diodes
    Yusuke Jitsui, Naoki Ohtani
    NANOSCALE RESEARCH LETTERS, SPRINGER, 71 - 4, Oct. 2012, English, Research paper (scientific journal)
  • Fabrication of near-infrared polymer light-emitting-diodes using dispersed laser dye
    Yusuke Jitsui, Naoki Ohtani
    JOURNAL OF THE KOREAN PHYSICAL SOCIETY, KOREAN PHYSICAL SOC, 60(10)1557 - 1559, May 2012, English, Research paper (scientific journal)
  • Fabrication and photoluminescence properties of semiconductor microtubes separated from substrates like bridge structures
    Yuki Ito, Koichi Akahane, Makoto Hosoda, Naoki Ohtani
    PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 9, NO 12, WILEY-V C H VERLAG GMBH, 9(12)2358 - 2361, 2012, English, Research paper (international conference proceedings)
  • Excitonic Rabi oscillations in self-assembled quantum dots studied by photon echoes
    Kenta Asakura, Yasuyoshi Mitsumori, Hideo Kosaka, Keiichi Edamatsu, Kouichi Akahane, Naokatsu Yamamoto, Masahide Sasaki, Naoki Ohtani
    PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 9, NO 12, WILEY-V C H VERLAG GMBH, 9(12)2513 - 2516, 2012, English, Research paper (international conference proceedings)
  • White Organic Light-Emitting Diodes Using Two Phosphorescence Materials in a Starburst Hole-Transporting Layer
    Tomoya Inden, Tomoya Hishida, Masayuki Takahashi, Masato Ohsumi, Naoki Ohtani
    INTERNATIONAL JOURNAL OF PHOTOENERGY, HINDAWI PUBLISHING CORPORATION, 2012703496 , 2012, English, Research paper (scientific journal)
  • Excitonic Rabi oscillations in semiconductor quantum dot observed by photon echo spectroscopy
    K. Asakura, Y. Mitsumori, H. Kosaka, K. Edamatsu, K. Akahane, N. Yamamoto, M. Sasaki, N. Ohtani
    PHYSICS OF SEMICONDUCTORS: 30TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, AMER INST PHYSICS, 1399529 - 530, 2011, English, Research paper (international conference proceedings)
  • Fabrication of Organic Light-Emitting Diodes Using Photosynthetic Pigments Extracted from Spinach
    Naoki Ohtani, Natsuko Kitagawa, Takashi Matsuda
    JAPANESE JOURNAL OF APPLIED PHYSICS, JAPAN SOC APPLIED PHYSICS, 50(1)01BC08 , Jan. 2011, English, Research paper (scientific journal)
  • Organic near-infrared photodiodes containing a wide-bandgap polymer and an n-type dopant in the active layer
    Naoki Ohtani, Kiichiro Nakajima, Ken-ichi Bando
    PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 8, NO 9, WILEY-V C H VERLAG GMBH, 8(9)2907 - 2910, 2011, English, Research paper (international conference proceedings)
  • Observation and numerical analysis of quantum subband energies from photoluminescence spectra of organic multiple-quantum wells
    Naoki Ohtani, Masaya Murata, Takafumi Yamamoto
    MICROELECTRONICS JOURNAL, ELSEVIER SCI LTD, 40(4-5)867 - 868, Apr. 2009, English, Research paper (scientific journal)
  • 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM)-doping density dependence of luminescence spectra and white emission in polymer light-emitting diodes
    Akinori Inoue, Takeshi Hosokawa, Motoki Haishi, Naoki Ohtani
    Physica Status Solidi (C) Current Topics in Solid State Physics, 6(1)334 - 337, 2009, English, Research paper (international conference proceedings)
  • Improvement of carrier transport and luminous efficiency of organic light emitting diodes by introducing a co-deposited active layer
    Naoki Ohtani, Masaya Murata, Keiichiro Kashiwabara, Kazunori Kurata
    16TH INTERNATIONAL CONFERENCE ON ELECTRON DYNAMICS IN SEMICONDUCTORS, OPTOELECTRONICS AND NANOSTRUCTURES (EDISON 16), IOP PUBLISHING LTD, 1930121060 , 2009, English, Research paper (international conference proceedings)
  • 4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran (DCM)-doping density dependence of luminescence spectra and white emission in polymer light-emitting diodes
    Akinori Inoue, Takeshi Hosokawa, Motoki Haishi, Naoki Ohtani
    PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 6, NO 1, WILEY-V C H VERLAG GMBH, 6(1)334 - 337, 2009, English, Research paper (international conference proceedings)
  • Influence of co-deposited active layers on carrier transport and luminescent properties in organic light emitting diodes
    Masaya Murata, Takayuki Yamamoto, Motoki Haishi, Taro Ando, Naoki Ohtani
    PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 6, NO 1, WILEY-V C H VERLAG GMBH, 6(1)330 - +, 2009, English, Research paper (international conference proceedings)
  • Photoluminescence properties of annealed InAs quantum dots capped by InGaAs layers
    Shingo Hiratsuka, Shanugam Saravanan, Takahisa Harayama, Naoki Ohtani
    PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 6, NO 1, WILEY-V C H VERLAG GMBH, 6(1)189 - +, 2009, English, Research paper (international conference proceedings)
  • Various photoluminescence properties due to Gamma-X resonance in type-I GaAs/AlAs multi-quantum wells consisting of quantum wells with different thicknesses
    Naoki Ohtani, Hiroyuki Endo, Shingo Hiratsuka, Hiroshi Kitamura, Toshinari Takamatsu, Makoto Hosoda
    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, ELSEVIER SCIENCE BV, 40(6)2016 - 2018, Apr. 2008, English, Research paper (scientific journal)
  • Evaluation of subband energy in TPD/DCM organic multiple quantum wells
    Takayuki Takayuki, Masaya Murata, Motoki Haishi, Taro Ando, Naoki Ohtani
    THIN FILM PHYSICS AND APPLICATIONS, SIXTH INTERNATIONAL CONFERENCE, SPIE-INT SOC OPTICAL ENGINEERING, 6984, 2008, English, Research paper (international conference proceedings)
  • Evaluation of carrier density distribution and population inversion caused by Gamma-X scattering in GaAs/AlAs multi-quantum wells
    H. Kitamura, S. Hiratsuka, M. Hosoda, N. Ohtani
    THIN FILM PHYSICS AND APPLICATIONS, SIXTH INTERNATIONAL CONFERENCE, SPIE-INT SOC OPTICAL ENGINEERING, 6984, 2008, English, Research paper (international conference proceedings)
  • Bias polarity dependence of carrier injection into high-energy states in asymmetric GaAs/AlAs multiple-quantum wells embedded in an n-i-n diode
    Hiroshi Kitamura, Shingo Hiratsuka, Makoto Hosoda, Kouichi Akahane, Naoki Ohtani
    INTERNATIONAL SYMPOSIUM ON ADVANCED NANODEVICES AND NANOTECHNOLOGY, IOP PUBLISHING LTD, 109, 2008, English, Research paper (international conference proceedings)
  • Quantum size effect on photoluminescence and electroluminescence properties in organic multiple quantum wells
    Takayuki Yamamoto, Masaya Murata, Motoki Haishi, Taro Ando, Naoki Ohtani
    INTERNATIONAL SYMPOSIUM ON ADVANCED NANODEVICES AND NANOTECHNOLOGY, IOP PUBLISHING LTD, 109012036 , 2008, English, Research paper (international conference proceedings)
  • Photoluminescence properties affected by carrier transport between X and different first excited states originating from interface imperfection in GaAs/AlAs multi-quantum wells
    Hiroyuki Endo, Shingo Hiratsuka, Hiroshi Kitamura, Toshinari Takamatsu, Makoto Hosoda, Naoki Ohtani
    JAPANESE JOURNAL OF APPLIED PHYSICS, JAPAN SOC APPLIED PHYSICS, 47(1)682 - 684, Jan. 2008, English, Research paper (scientific journal)
  • Strong optical emissions from two-dimensional metal photonic crystals with semiconductor multiple quantum wells
    Shin-ichiro Gozu, Akio Ueta, Kouichi Akahane, Naokatsu Yamamoto, Masahiro Tsuchiya, Naoki Ohtani
    JOURNAL OF APPLIED PHYSICS, AMER INST PHYSICS, 101(8)086107 , Apr. 2007, English, Research paper (scientific journal)
  • Metamorphic molecular beam epitaxy growth and selective wet etching for epitaxial layer lift-off of AlAsSb toward optical waveguides with high optical confinement
    Shin-ichiro Ozua, Kouichi Akahane, Naokatsu Yamamoto, Akio Ueta, Naoki Ohtani, Masahiro Tsuchiya
    JOURNAL OF CRYSTAL GROWTH, ELSEVIER SCIENCE BV, 301(1)955 - 958, Apr. 2007, English, Research paper (scientific journal)
  • Growth of InGaSb quantum dot structures on GaAs and silicon substrates
    Naokatsu Yamamoto, Kouichi Akahane, Shin-ichirou Gozu, Akio Ueta, Naoki Ohtani, Masahiro Tsuchiya
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, INST PURE APPLIED PHYSICS, 46(4B)2401 - 2404, Apr. 2007, English, Research paper (scientific journal)
  • Site control of very low density InAs QDs on patterned GaAs nano-wire surfaces
    Akio Ueta, Kouichi Akahane, Sinichiro Gozu, Naokatsu Yamamoto, Naoki Ohtani, Masahiro Tsuchiya
    JOURNAL OF CRYSTAL GROWTH, ELSEVIER SCIENCE BV, 301(1)846 - 848, Apr. 2007, English, Research paper (scientific journal)
  • (In)GaSb/AlGaSb quantum wells grown on Si substrates
    Kouichi Akahane, Naokatsu Yamamoto, Shin-ichiro Gozu, Akio Ueta, Naoki Ohtani
    THIN SOLID FILMS, ELSEVIER SCIENCE SA, 515(10)4467 - 4470, Mar. 2007, English, Research paper (scientific journal)
  • Influence of L subband states on optical and electric properties in GaAs/AlAs type-I superlattices
    Naoki Ohtani, Makoto Hosoda
    PHYSICS OF SEMICONDUCTORS, PTS A AND B, AMER INST PHYSICS, 893565 - +, 2007, English, Research paper (international conference proceedings)
  • Strong optical confinements inside the wavelength-size metal mirror microcavities: New concept for small light emitters using InAsSb QDs microcavities
    Akio Ueta, Sin-ichiro Gozu, Kouichi Akahane, Naokatsu Yamamoto, Masahiro Tsuchiya, Naoki Ohtani
    PHYSICS OF SEMICONDUCTORS, PTS A AND B, AMER INST PHYSICS, 8931145 - +, 2007, English, Research paper (international conference proceedings)
  • Various photoluminescence properties observed in a GaAs/AlAs asymmetric double-quantum-well superlattice
    Naoki Ohtani, Makoto Hosoda
    PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4, NO 2, WILEY-V C H VERLAG GMBH, 4(2)353 - +, 2007, English, Research paper (international conference proceedings)
  • Optical cavity properties of metal mirror microcavities with InAsSb quantum dots
    Akio Ueta, Sin-ichiro Gozu, Kouichi Akahane, Naokatsu Yamamoto, Masahiro Tsuchiya, Naoki Ohtani
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, INST PURE APPLIED PHYSICS, 45(11)8650 - 8652, Nov. 2006, English, Research paper (scientific journal)
  • Residual carrier density in GaSb grown on Si substrates
    Kouichi Akahane, Naokatsu Yamamoto, Shin-ichiro Gozu, Akio Ueta, Naoki Ohtani
    THIN SOLID FILMS, ELSEVIER SCIENCE SA, 515(2)748 - 751, Oct. 2006, English, Research paper (scientific journal)
  • Nanoscale structure fabrication of multiple AlGaSb/InGaSb quantum wells by reactive ion etching with chlorine-based gases toward photonic crystals
    Shin-ichiro Gozu, Kouichi Akahane, Naokatsu Yamamoto, Akio Ueta, Naoki Ohtani, Masahiro Tsuchiya
    JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, A V S AMER INST PHYSICS, 24(5)2291 - 2294, Sep. 2006, English, Research paper (scientific journal)
  • Study of InAsN quantum dots on GaAs substrates by molecular beam epitaxy
    A Ueta, K Akahane, S Gozu, N Yamamoto, N Ohtani
    PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, WILEY-V C H VERLAG GMBH, 243(7)1514 - 1518, Jun. 2006, English, Research paper (scientific journal)
  • Optical communications waveband lasing from Sb-based quantum dot vertical-cavity laser
    N Yamamoto, K Akahane, SI Gozu, A Ueta, N Ohtani
    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, ELSEVIER SCIENCE BV, 32(1-2)516 - 519, May 2006, English, Research paper (scientific journal)
  • Change in band configuration of In0.57Ga0.43As1-xSbx/AlAs0.48Sb0.52 quantum wells from type-II to type-I by increasing Sb composition x
    S Gozu, K Akahane, N Yamamoto, A Ueta, N Ohtani
    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, ELSEVIER SCIENCE BV, 32(1-2)230 - 233, May 2006, English, Research paper (scientific journal)
  • 1.5 mu m emission from InAs quantum dots with InGaAsSb strain-reducing layer grown on GaAs substrates
    K Akahane, N Yamamoto, S Gozu, A Ueta, N Ohtani
    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, ELSEVIER SCIENCE BV, 32(1-2)81 - 84, May 2006, English, Research paper (scientific journal)
  • Observation of subband resonances between high-energy states in a series of asymmetric double-quantum-well superlattice systems
    M Hosoda, M Sato, Y Hirose, T Shioji, J Nohgi, C Domoto, N Ohtani
    PHYSICAL REVIEW B, AMERICAN PHYSICAL SOC, 73(16)165329 , Apr. 2006, English, Research paper (scientific journal)
  • Selective formation of self-organized InAs quantum dots grown on patterned GaAs substrates by molecular beam epitaxy
    A Ueta, K Akahane, S Gozu, N Yamamoto, N Ohtani
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, INST PURE APPLIED PHYSICS, 45(4B)3556 - 3559, Apr. 2006, English, Research paper (scientific journal)
  • 1.55-mu m-waveband emissions from Sb-based quantum-dot vertical-cavity surface-emitting laser structures fabricated on GaAs substrate
    N Yamamoto, K Akahane, S Gozu, A Ueta, N Ohtani
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, INST PURE APPLIED PHYSICS, 45(4B)3423 - 3426, Apr. 2006, English, Research paper (scientific journal)
  • Growth of antimonide compound semiconductor on Si(001) substrate
    Kouichi Akahane, Naokatsu Yamamoto, Shin-ichiro Gozu, Akio Ueta, Naoki Ohtani, Masahiro Tsuchiya
    ACTIVE AND PASSIVE OPTICAL COMPONENTS FOR COMMUNICATIONS VI, SPIE-INT SOC OPTICAL ENGINEERING, 6389, 2006, English, Research paper (international conference proceedings)
  • Sb-based quantum dots for creating novel light-emitting devices for optical communications
    Naokatsu Yamamoto, Kouichi Akahane, Shin-ichirou Gozu, Akio Ueta, Naoki Ohtani, Masahiro Tsuchiya
    NANOPHOTONICS FOR COMMUNICATION: MATERIALS, DEVICES, AND SYSTEMS III, SPIE-INT SOC OPTICAL ENGINEERING, 6393, 2006, English, Research paper (international conference proceedings)
  • Optical and structural properties of metamorphic InGaAs/AlAsSb quantum wells grown on GaAs substrates
    Shin-ichiro Gozu, Akio Ueta, Naokatsu Yamamoto, Kouichi Akahane, Naoki Ohtani, Masahiro Tsuchiya
    2006 INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE AND RELATED MATERIALS CONFERENCE PROCEEDINGS, IEEE, 298 - +, 2006, English, Research paper (international conference proceedings)
  • Highly-ordered and highly-stacked (150-layers) quantum dots
    Kouichi Akahane, Naokatsu Yamamoto, Shin-ichiro Gozu, Akio Ueta, Naoki Ohtani, Masahiro Tsuchiya
    2006 INTERNATIONAL CONFERENCE ON INDIUM PHOSPHIDE AND RELATED MATERIALS CONFERENCE PROCEEDINGS, IEEE, 192 - +, 2006, English, Research paper (international conference proceedings)
  • All-optical control of the resonant-photon tunneling effect observed in GaAs/AlGaAs multilayered structures containing quantum dots
    N Yamamoto, K Akahane, SI Gozu, N Ohtani
    APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 87(23)231119 , Dec. 2005, English, Research paper (scientific journal)
  • Initial growth stage of GaSb on Si(001) substrates with AlSb initiation layers
    K Akahane, N Yamamoto, S Gozu, A Ueta, N Ohtani
    JOURNAL OF CRYSTAL GROWTH, ELSEVIER SCIENCE BV, 283(3-4)297 - 302, Oct. 2005, English, Research paper (scientific journal)
  • Electron scattering between X and L indirect valleys in type-I GaAs AlAs semiconductor superlattices
    M. Hosoda, J. Nohgi, N. Ohtani
    Physical Review B - Condensed Matter and Materials Physics, 72(3), 15 Jul. 2005, English, Research paper (scientific journal)
  • Circular polarization control in silicon-based all-optical switch
    N Yamamoto, T Matsuno, H Takai, N Ohtani
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS, JAPAN SOC APPLIED PHYSICS, 44(7A)4749 - 4751, Jul. 2005, English, Research paper (scientific journal)
  • Electron scattering between X and L indirect valleys in type-I GaAs/AlAs semiconductor superlattices
    M Hosoda, J Nohgi, N Ohtani
    PHYSICAL REVIEW B, AMER PHYSICAL SOC, 72(3)033317 , Jul. 2005, English, Research paper (scientific journal)
  • Characteristics of coupled mode of excitonic quantum beat and coherent longitudinal optical phonon in GaAs/AlAs multiple quantum wells
    T Furuichi, K Mizoguchi, O Kojima, K Akahane, N Yamamoto, N Ohtani, M Nakayama
    JOURNAL OF LUMINESCENCE, ELSEVIER SCIENCE BV, 112(1-4)142 - 145, Apr. 2005, English, Research paper (scientific journal)
  • Strong photoluminescence and laser operation of InAs quantum dots covered by a GaAsSb strain-reducing layer
    K Akahane, N Yamamoto, S Gozu, N Ohtani
    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, ELSEVIER SCIENCE BV, 26(1-4)395 - 399, Feb. 2005, English, Research paper (scientific journal)
  • Demonstration of a nanophotonic NOT-gate using near-field optically coupled quantum dots
    Tadashi Kawazoe, Kiyoshi Kobayashi, Kouichi Akahane, Naokatsu Yamamoto, Naoki Ohtani, Motoichi Ohtsu
    2005 5th IEEE Conference on Nanotechnology, 1579 - 582, 2005, English, Research paper (international conference proceedings)
  • Excitonic quantum beats dressed with coherent phonons
    K Mizoguchi, T Furuichi, O Kojima, M Nakayama, K Akahane, N Yamamoto, N Ohtani
    ULTRAFAST PHENOMENA XIV, SPRINGER-VERLAG BERLIN, 79257 - 259, 2005, English, Research paper (international conference proceedings)
  • Resonant-photon tunneling effect at 1.5 micron observed in GaAs/AlGaAs multi-layered structure containing InGaSb quantum dots
    N Yamamoto, K Akahane, S Gozu, N Ohtani
    Physics of Semiconductors, Pts A and B, AMER INST PHYSICS, 7721533 - 1534, 2005, English, Research paper (international conference proceedings)
  • Anomalous photoluminescence branches observed in an asymmetric double-quantum-well superlattice
    N Ohtani, N Yamamoto, J Nohgi, M Hosoda
    Physica Status Solidi C - Conferences and Critical Reviews, Vol 2, No 8, WILEY-V C H VERLAG GMBH, 2(8)3006 - 3009, 2005, English, Research paper (international conference proceedings)
  • Growth of InAsSb quantum dots on GaAs substrates using periodic supply epitaxy
    A Ueta, SI Gozu, K Akahane, N Yamamoto, N Ohtani
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, INST PURE APPLIED PHYSICS, 44(20-23)L696 - L698, 2005, English, Research paper (scientific journal)
  • High-quality GaSb/AlGaSb quantum well grown on Si substrate
    K Akahane, N Yamamoto, S Gozu, N Ohtani
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS, INST PURE APPLIED PHYSICS, 44(1-7)L15 - L17, 2005, English, Research paper (scientific journal)
  • Over 1.3 mu m CW laser emission from InGaSb quantum-dot vertical-cavity surface-emitting laser on GaAs substrate
    N Yamamoto, K Akahane, S Gozu, N Ohtani
    ELECTRONICS LETTERS, IEE-INST ELEC ENG, 40(18)1120 - 1121, Sep. 2004, English, Research paper (scientific journal)
  • Coupled mode of the coherent optical phonon and excitonic quantum beat in GaAs/AlAs multiple quantum wells
    K. Mizoguchi, O. Kojima, T. Furuichi, M. Nakayama, K. Akahane, N. Yamamoto, N. Ohtani
    Physical Review B - Condensed Matter and Materials Physics, 69(23)1 - 233302, Jun. 2004, English, Research paper (scientific journal)
  • Coupled mode of the coherent optical phonon and excitonic quantum beat in GaAs/AlAs multiple quantum wells
    K Mizoguchi, O Kojima, T Furuichi, M Nakayama, K Akahane, N Yamamoto, N Ohtani
    PHYSICAL REVIEW B, AMER PHYSICAL SOC, 69(23)233302 , Jun. 2004, English, Research paper (scientific journal)
  • All-optical switching and memorizing devices using resonant photon tunneling effect in multi-layered GaAs/AlGaAs structures
    N Yamamoto, N Ohtani
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, INST PURE APPLIED PHYSICS, 43(4A)1393 - 1397, Apr. 2004, English, Research paper (scientific journal)
  • Formation of electric-field domains in an asymmetric double-quantum-well GaAs/AlAs superlattice
    N Ohtani, Y Hirose, T Nishimura, T Aida, M Hosoda
    SEMICONDUCTOR SCIENCE AND TECHNOLOGY, IOP PUBLISHING LTD, 19(4)S89 - S90, Apr. 2004, English, Research paper (scientific journal)
  • Uniaxial-strain-induced transition from type-II to type-I band configuration of quantum well microtubes
    N Ohtani, K Kishimoto, K Kubota, S Saravanan, Y Sato, S Nashima, P Vaccaro, T Aida, M Hosoda
    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, ELSEVIER SCIENCE BV, 21(2-4)732 - 736, Mar. 2004, English, Research paper (scientific journal)
  • Growth of high-density InGaSb quantum dots on silicon atoms irradiated GaAs substrates
    N Yamamoto, K Akahane, N Ohtani
    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, ELSEVIER SCIENCE BV, 21(2-4)322 - 325, Mar. 2004, English, Research paper (scientific journal)
  • Long-wavelength light emission from InAs quantum dots covered by GaAsSb grown on GaAs substrates
    K Akahane, N Yamamoto, N Ohtani
    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, ELSEVIER SCIENCE BV, 21(2-4)295 - 299, Mar. 2004, English, Research paper (scientific journal)
  • Heteroepitaxial growth of GaSb on Si(001) substrates
    K Akahane, N Yamamoto, S Gozu, N Ohtani
    JOURNAL OF CRYSTAL GROWTH, ELSEVIER SCIENCE BV, 264(1-3)21 - 25, Mar. 2004, English, Research paper (scientific journal)
  • Room temperature CW operation on 1.3 mu m Sb-based quantum dot lasers and VCSELs
    N Yamamoto, K Akahane, S Gozu, N Ohtani
    2004 IEEE LEOS ANNUAL MEETING CONFERENCE PROCEEDINGS, VOLS 1 AND 2, IEEE, 406 - 407, 2004, English, Research paper (international conference proceedings)
  • Stacking of over 150 layers of InAs quantum dots on InP(311)B substrates
    K Akahane, N Yamamoto, S Gozu, N Ohtani
    2004 International Conference on Indium Phosphide and Related Materials, Conference Proceedings, IEEE, 85 - 88, 2004, English, Research paper (international conference proceedings)
  • CW operation at 1.34 mu m of an InGaSb quantum-dot vertical-cavity surface-emitting laser (VCSEL) on GaAs substrate
    N Yamamoto, K Akahane, SI Gozu, N Ohtani
    2004 International Conference on Indium Phosphide and Related Materials, Conference Proceedings, IEEE, 564 - 565, 2004, English, Research paper (international conference proceedings)
  • Self-consistent calculation of subband occupation and electron-hole plasma effects: Variational approach to quantum well states with Hartree and exchange-correlation interactions
    T Ando, H Taniyama, N Ohtani, M Nakayama, M Hosoda
    JOURNAL OF APPLIED PHYSICS, AMER INST PHYSICS, 94(7)4489 - 4501, Oct. 2003, English, Research paper (scientific journal)
  • Role of A1 in spacer layer on the formation of stacked InAs quantum dot structures on InP(311)B
    K Akahane, N Yamamoto, N Ohtani, Y Okada, M Kawabe
    JOURNAL OF CRYSTAL GROWTH, ELSEVIER SCIENCE BV, 256(1-2)7 - 11, Aug. 2003, English, Research paper (scientific journal)
  • Quantum-well microtube constructed from a freestanding thin quantum-well layer
    M Hosoda, Y Kishimoto, M Sato, S Nashima, K Kubota, S Saravanan, PO Vaccaro, T Aida, N Ohtani
    APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 83(5)1017 - 1019, Aug. 2003, English, Research paper (scientific journal)
  • Photoluminescence property of uniaxial strained GaAs/AlGaAs quantum wells contained in a micro-tube
    N Ohtani, K Kubota, P Vaccaro, T Aida, A Hosoda
    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, ELSEVIER SCIENCE BV, 17(1-4)391 - 392, Apr. 2003, English, Research paper (scientific journal)
  • Growth of InAs quantum dots on a low lattice-mismatched AlGaSb layer prepared on GaAs(001) substrates
    N Yamamoto, K Akahane, S Gozu, N Ohtani
    FUNCTIONAL NANOMATERIALS FOR OPTOELECTRONICS AND OTHER APPLICATIONS, TRANS TECH PUBLICATIONS LTD, 99-100(1)49 - 52, 2003, English, Research paper (scientific journal)
  • Fabrication of ultra-high density InAs-stacked quantum dots by strain-controlled growth on InP(311)B substrate
    K Akahane, N Ohtani, Y Okada, M Kawabe
    JOURNAL OF CRYSTAL GROWTH, ELSEVIER SCIENCE BV, 245(1-2)31 - 36, Nov. 2002, English, Research paper (scientific journal)
  • Numerically stable and flexible method for solutions of the Schrodinger equation with self-interaction of carriers in quantum wells
    T Ando, H Taniyama, N Ohtani, M Hosoda, M Nakayama
    IEEE JOURNAL OF QUANTUM ELECTRONICS, IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 38(10)1372 - 1383, Oct. 2002, English, Research paper (scientific journal)
  • Photoluminescence of GaAs/AlGaAs micro-tubes containing uniaxially strained quantum wells
    K Kubota, PO Vaccaro, N Ohtani, Y Hirose, M Hosoda, T Aida
    PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, ELSEVIER SCIENCE BV, 13(2-4)313 - 316, Mar. 2002, English, Research paper (scientific journal)
  • Excitation of right- and left-circularly polarized photoluminescence in silicon-based luminescent materials
    N Yamamoto, Hosako, I, M Akiba, N Ohtani, H Takai
    JOURNAL OF APPLIED PHYSICS, AMER INST PHYSICS, 91(5)2725 - 2728, Mar. 2002, English, Research paper (scientific journal)
  • Observation of electronic band-structure modification in microtubed quantum well
    Y Kishimoto, S Saravanan, K Kubota, P Vaccaro, M Sato, JMZ Ocampo, T Aida, N Ohtani, M Hosoda
    COMMAD 2002 PROCEEDINGS, IEEE, 315 - 318, 2002, English, Research paper (international conference proceedings)
  • Formation process of high-field domain in superlattices observed by photoluminescence spectra branch
    M Hosoda, N Ohtani, C Domoto, T Aida
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, INST PURE APPLIED PHYSICS, 40(4B)3023 - 3031, Apr. 2001, English, Research paper (scientific journal)
  • Carrier transport affected by hole-subband resonances in a strained GaAs/InAlAs superlattice
    M Hosoda, K Kuroyanagi, N Ohtani, T Aida
    PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II, SPRINGER-VERLAG BERLIN, 87847 - 848, 2001, English, Research paper (international conference proceedings)
  • Intersubband electroluminescence using X-Gamma carrier injection in a GaAs/AlAs double-quantum-well superlattice
    C Domoto, N Ohtani, K Kuroyanagi, PO Vaccaro, T Nishimura, H Takeuchi, M Nakayama
    PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II, SPRINGER-VERLAG BERLIN, 87729 - 730, 2001, English, Research paper (international conference proceedings)
  • Controllable bifurcation processes in undoped, photoexcited GaAs/AlAs superlattices
    KJ Luo, SW Teitsworth, M Rogozia, HT Grahn, LL Bonilla, J Galan, N Ohtani
    PROCEEDINGS OF THE 5TH EXPERIMENTAL CHAOS CONFERENCE, WORLD SCIENTIFIC PUBL CO PTE LTD, 37 - 43, 2001, English, Research paper (international conference proceedings)
  • Photocurrent self-oscillations in weakly coupled, type-II GaAs/AlAs superlattices embedded in p-i-n and n-i-n diodes
    N Ohtani, M Rogozia, C Domoto, T Nishimura, HT Grahn
    PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II, SPRINGER-VERLAG BERLIN, 87839 - 840, 2001, English, Research paper (international conference proceedings)
  • Intersubband electroluminescence using X-Γ carrier injection in a GaAs/AlAs superlattice
    C. Domoto, N. Ohtani, K. Kuroyanagi, P. O. Vaccaro, H. Takeuchi, M. Nakayama, T. Nishimura
    Applied Physics Letters, American Institute of Physics Inc., 77(6)848 - 850, 07 Aug. 2000, English, Research paper (scientific journal)
  • Population inversion between subbands in simple periodical GaAs/AIAs superlattices
    C. Domoto, P. O. Vaccaro, N. Ohtani
    IEE Proceedings: Optoelectronics, 147(3)225 - 228, Jun. 2000, English, Research paper (scientific journal)
  • Electric-field effects on photoluminescence properties in a GaAs/AlAs marginal type-I superlattice
    N Ohtani, C Domoto, N Egami, H Mimura, T Ando, M Nakayama, M Hosoda
    PHYSICA E, ELSEVIER SCIENCE BV, 7(3-4)586 - 589, May 2000, English, Research paper (scientific journal)
  • Anomalous photoluminescence originating from resonance between X and intermediate states in GaAs/AlAs superlattices
    N Ohtani, C Domoto, K Kuroyanagi, N Egami, M Hosoda
    JOURNAL OF LUMINESCENCE, ELSEVIER SCIENCE BV, 87-9(1)415 - 417, May 2000, English, Research paper (scientific journal)
  • Photoluminescence and carrier transport properties via the intersubband scattering in a GaAs/AlAs superlattice under applied electric field
    M Ando, M Nakayama, H Takeuchi, H Nishimura, N Ohtani, N Egami, M Hosoda, H Mimura
    JOURNAL OF LUMINESCENCE, ELSEVIER SCIENCE BV, 87-9(1)411 - 414, May 2000, English, Research paper (scientific journal)
  • Carrier transport in GaAs/AlAs type-II superlattices under electric field: Switch from X-X to Gamma-Gamma transfer
    M Hosoda, N Ohtani, K Kuroyanagi, C Domoto
    APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 76(14)1866 - 1868, Apr. 2000, English, Research paper (scientific journal)
  • Electric-field-induced combination of Wannier-Stark localization and type-I-type-II crossover in a marginal type-I GaAs/AlAs superlattice
    N Ohtani, C Domoto, N Egami, H Mimura, M Ando, M Nakayama, M Hosoda
    PHYSICAL REVIEW B, AMER PHYSICAL SOC, 61(11)7505 - 7510, Mar. 2000, English, Research paper (scientific journal)
  • Light-hole Stark-ladder photoluminescence induced by hole injection from a remote heavy-hole state in a GaAs/InAlAs superlattice
    K Kuroyanagi, N Ohtani, N Egami, K Tominaga, M Hosoda, H Takeuchi, M Nakayama
    COMPOUND SEMICONDUCTORS 1999, IOP PUBLISHING LTD, (166)139 - 142, 2000, English, Research paper (scientific journal)
  • Phase diagram of static and dynamic electric field domain formation in semiconductor superlattices
    N Ohtani, N Egami, HT Grahn, KH Ploog
    PHYSICA B-CONDENSED MATTER, ELSEVIER SCIENCE BV, 272(1-4)205 - 208, Dec. 1999, English, Research paper (scientific journal)
  • Light-hole Stark-ladder photoluminescence induced by heavy-hole-light-hole resonance in a GaAs/InAIAs superlattice
    K Kuroyanagi, N Ohtani, N Egami, K Tominaga, M Hosoda, H Takeuchi, M Nakayama
    PHYSICA B, ELSEVIER SCIENCE BV, 272(1-4)198 - 201, Dec. 1999, English, Research paper (scientific journal)
  • Controllable bistabilities and bifurcations in a photoexcited GaAs AlAs superlattice
    KJ Luo, SW Teitsworth, H Kostial, HT Grahn, N Ohtani
    APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 74(25)3845 - 3847, Jun. 1999, English, Research paper (scientific journal)
  • Influence of strain effects on hole-subband resonances in GaAs/InAlAs superlattices
    K Kuroyanagi, N Ohtani, N Egami, K Tominaga, M Nakayama
    APPLIED SURFACE SCIENCE, ELSEVIER SCIENCE BV, 142(1-4)633 - 636, Apr. 1999, English, Research paper (scientific journal)
  • Gamma-Chi electron transfer in GaAs/AlAs type-I superlattices
    H Mimura, M Hosoda, N Ohtani, K Yokoo
    APPLIED SURFACE SCIENCE, ELSEVIER SCIENCE BV, 142(1-4)624 - 628, Apr. 1999, English, Research paper (scientific journal)
  • Electroluminescence in undoped GaAs/AlAs superlattice due to avalanche breakdown
    C Domoto, N Ohtani, K Kuroyanagi, PO Vaccaro, N Egami
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, JAPAN J APPLIED PHYSICS, 38(4B)2577 - 2579, Apr. 1999, English, Research paper (scientific journal)
  • Transition between static and dynamic electric-field domain formation in weakly coupled GaAs/AlAs superlattices
    N Ohtani, N Egami, HT Grahn, KH Ploog, LL Bonilla
    PHYSICAL REVIEW B, AMER PHYSICAL SOC, 58(12)R7528 - R7531, Sep. 1998, English, Research paper (scientific journal)
  • Carrier transport affected by Gamma-X transfer in type-I GaAs/AlAs superlattices
    M Hosoda, N Ohtani, H Mimura, K Tominaga, T Watanabe, H Inomata, K Fujiwara
    PHYSICAL REVIEW B, AMER PHYSICAL SOC, 58(11)7166 - 7180, Sep. 1998, English, Research paper (scientific journal)
  • Photoluminescence detection of the X-electron resonance in a GaAs/AlAs type-II superlattice
    M Nakayama, M Ando, Y Kumamoto, H Nishimura, N Ohtani, N Egami, K Fujiwara, M Hosoda
    PHYSICAL REVIEW B, AMER PHYSICAL SOC, 58(11)7216 - 7221, Sep. 1998, English, Research paper (scientific journal)
  • Carrier transport and photoluminescence affected by Gamma-X resonance in GaAs-AlAs type-I superlattices
    H Mimura, M Hosoda, N Ohtani, K Fujiwara, K Yokoo
    PHYSICA E, ELSEVIER SCIENCE BV, 2(1-4)308 - 312, Jul. 1998, English, Research paper (scientific journal)
  • Photocurrent self-oscillations in undoped GaAs/AlAs superlattices modulated by an external ac voltage
    N Ohtani, N Egami, K Fujiwara, HT Grahn
    SOLID-STATE ELECTRONICS, PERGAMON-ELSEVIER SCIENCE LTD, 42(7-8)1509 - 1513, Jul. 1998, English, Research paper (scientific journal)
  • Wavefunction delocalization of strongly-localized Stark-ladder states in a GaAs/AlAs superlattice
    M Ando, M Nakayama, H Nishimura, M Hosoda, N Ohtani, N Egami, K Fujiwara
    SOLID-STATE ELECTRONICS, PERGAMON-ELSEVIER SCIENCE LTD, 42(7-8)1499 - 1503, Jul. 1998, English, Research paper (scientific journal)
  • Carrier density dependence of transitions between chaotic and periodic photocurrent oscillations in undoped GaAs/AlAs superlattices
    N. Ohtani, N. Egami, H. T. Grahn, K. H. Ploog
    Physica B: Condensed Matter, Elsevier, 249-251(1)878 - 881, 17 Jun. 1998, English, Research paper (scientific journal)
  • Photocurrent and photoluminescence affected by Gamma-x electron transfer in type-I GaAs/AlAs superlattices
    H Mimura, M Hosoda, N Ohtani, K Yokoo
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, JAPAN J APPLIED PHYSICS, 37(3B)1646 - 1649, Mar. 1998, English, Research paper (scientific journal)
  • Influence of Gamma-x resonance on photocurrent-voltage characteristics in GaAs/InAlAs strained superlattices
    K Kuroyanagi, N Ohtani, N Egami, K Tominaga, M Nakayama
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, JAPAN J APPLIED PHYSICS, 37(3B)1650 - 1653, Mar. 1998, English, Research paper (scientific journal)
  • Influence of Gamma-X mixing on carrier transport and photoluminescence in GaAs/AlAs type-I superlattices
    N Ohtani, M Hosoda, H Mimura, K Tominaga, T Watanabe, K Fujiwara
    SUPERLATTICES AND MICROSTRUCTURES, ACADEMIC PRESS LTD, 23(1)19 - 22, 1998, English, Research paper (scientific journal)
  • Current self-oscillations in undoped, photoexcited GaAs/AlAs type-I superlattices
    N Ohtani, N Egami, K Kuroyanagi, M Ando, M Hosoda, HT Grahn, KH Ploog
    PHYSICA STATUS SOLIDI B-BASIC RESEARCH, AKADEMIE VERLAG GMBH, 204(1)489 - 492, Nov. 1997, English, Research paper (scientific journal)
  • Photoluminescence from the barrier-X state in GaAs/InAlAs strained superlattices under applied-bias voltages
    K Kuroyanagi, N Ohtani, N Egami, K Tominaga, M Ando, M Nakayama
    PHYSICA STATUS SOLIDI B-BASIC RESEARCH, AKADEMIE VERLAG GMBH, 204(1)187 - 190, Nov. 1997, English, Research paper (scientific journal)
  • Subband-resonance oscillations in undoped GaAs/AlAs type-II superlattices under photoexcitation
    H Mimura, M Hosoda, N Ohtani, HT Grahn, K Yokoo
    APPLIED SURFACE SCIENCE, ELSEVIER SCIENCE BV, 113(1)85 - 89, Apr. 1997, English, Research paper (scientific journal)
  • Anomalously large negative differential resistance due to resonances in type-I GaAs/AlAs superlattices
    M. Hosoda, N. Ohtani, K. Tominaga, H. Mimura, T. Watanabe
    Physical Review B - Condensed Matter and Materials Physics, 56(11)6432 - 6435, 1997, English, Research paper (scientific journal)
  • Observation of Γ-X resonances in type-I GaAs/AlAs semiconductor superlattices: Anomaly in photoluminescence
    M. Hosoda, H. Mimura, N. Ohtani, K. Tominaga, K. Fujita, T. Watanabe, H. Inomata, M. Nakayama
    Physical Review B - Condensed Matter and Materials Physics, 55(20)13689 - 13696, 1997, English, Research paper (scientific journal)
  • Photocurrent self-oscillations in a direct-gap GaAs-AlAs superlattice
    N Ohtani, M Hosoda, HT Grahn
    APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 70(3)375 - 377, Jan. 1997, English, Research paper (scientific journal)
  • Structural and optical investigations of high quality InGaAs/InAlAs short period superlattices grown on an InGaAs quasisubstrate
    K Tominaga, M Hosoda, N Ohtani, T Watanabe, H Inomata, K Fujiwara
    JOURNAL OF APPLIED PHYSICS, AMER INST PHYSICS, 80(10)5915 - 5920, Nov. 1996, English, Research paper (scientific journal)
  • Electric-field domain formation in type-II superlattices
    H Mimura, M Hosoda, N Ohtani, K Tominaga, K Fujita, T Watanabe, HT Grahn, K Fujiwara
    PHYSICAL REVIEW B, AMER PHYSICAL SOC, 54(4)R2323 - R2326, Jul. 1996, English, Research paper (scientific journal)
  • Current self-oscillations in photoexcited type-II GaAs-AlAs superlattices
    M Hosoda, H Mimura, N Ohtani, K Tominaga, T Watanabe, K Fujiwara, HT Grahn
    APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 69(4)500 - 502, Jul. 1996, English, Research paper (scientific journal)
  • Influence of type-I to Type-II transition by an applied electric field on photoluminescence and carrier transport in GaAs/AlAs type-I short-period superlattices
    N Ohtani, H Mimura, M Hosoda, K Tominaga, T Watanabe, K Fujiwara
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, JAPAN J APPLIED PHYSICS, 35(2B)1302 - 1305, Feb. 1996, English, Research paper (scientific journal)
  • Electric-field domain formation in type-II superlattices
    H. Mimura, M. Hosoda, N. Ohtani, K. Tominaga, K. Fujita, T. Watanabe, H. Grahn
    Physical Review B - Condensed Matter and Materials Physics, 54(4)R2323 - R2326, 1996, English, Research paper (scientific journal)
  • Anomalously delayed carrier transport in GaAs/AlAs thin-barrier superlattices
    N Ohtani, H Mimura, K Tominaga, M Hosoda, T Watanabe, G Tanaka, K Fujiwara
    SOLID-STATE ELECTRONICS, PERGAMON-ELSEVIER SCIENCE LTD, 40(1-8)759 - 762, 1996, English, Research paper (scientific journal)
  • EVIDENCE FOR GAMMA-CHI TRANSPORT IN TYPE-I GAAS/ALAS SEMICONDUCTOR SUPERLATTICES
    M HOSODA, N OHTANI, H MIMURA, K TOMINAGA, P DAVIS, T WATANABE, G TANAKA, K FUJIWARA
    PHYSICAL REVIEW LETTERS, AMERICAN PHYSICAL SOC, 75(24)4500 - 4503, Dec. 1995, English, Research paper (scientific journal)
  • DELAYED PHOTOCURRENT AFFECTED BY GAMMA-X RESONANCE IN GAAS/ALAS TYPE-I SHORT-PERIOD SUPERLATTICES
    H MIMURA, N OHTANI, M HOSODA, K TOMINAGA, T WATANABE, G TANAKA, K FUJIWARA
    APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 67(22)3292 - 3294, Nov. 1995, English, Research paper (scientific journal)
  • HIGHLY CONDUCTIVE AND WIDE OPTICAL BAND-GAP N-TYPE MU-C-SIC PREPARED BY ELECTRON-CYCLOTRON RESONANCE PLASMA-ENHANCED CHEMICAL VAPOR-DEPOSITION
    T FUTAGI, M KATSUNO, N OHTANI, Y OHTA, H MIMURA, K KAWAMURA
    APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 58(25)2948 - 2950, Jun. 1991, English, Research paper (scientific journal)

Misc

  • Phase Diagram of Static and Dynamic Electric Field Domain Formation in Semiconductor Superlattices
    N. Ohtani, N. Egami, H. T. Grahn, K. H. Ploog
    International Conference on Nonequilibrium Carrier Dynamics in Semiconductors (HCIS), (MoP-38)74 , Jul. 1999, English, Research paper, summary (international conference)
  • Electric-field effects on photoluminescence properties in a GaAs/AlAs marginal type-Ⅰsuperlattice
    N. Ohtani, C. Domoto, N. Egami, H. Mimura, M. Ando, M. Nakayama, M. Hosoda
    International Conference on Modulated Semiconductor Structures (MSS), (19)291 - 292, Jul. 1999, English, Research paper, summary (international conference)
  • Carrier Density Dependence and Phase Diagram of Static and Dynamic Domain Formation in Semiconductor Superlattices
    N. Ohtani, N. Egami, H. T. Grahn, K, H. Ploog
    18th Electronic Materials Symposium, (D5)35 - 36, 1999, English, Research paper, summary (national, other academic conference)
  • Electroluminescence in Undoped GaAs/AlAs Superlattices due to Avalanche Breakdown
    C. Domoto, N. Ohtani, K. Kuroyanagi, P. Vaccaro, N. Egami
    International Conference on Solid State Devices and Materials, (C-6-5)342 - 343, Sep. 1998, English, Research paper, summary (international conference)
  • X-X Electron Resonance Detected by Type-ⅡPhotoluminescence in a GaAs/AlAs Superlattice
    M. Nakayama, M. Ando, H. Nishimura, N. Ohtani, N. Egami, K. Fujiwara, M. Hosoda
    International Conference on Physics of Semiconductors (ICPS), (Th-P46), Aug. 1998, English, Research paper, summary (international conference)
  • Carrier Density and Temperature Dependence of Photocurrent Self-oscillation in GaAs/AlAs Superlattices
    N. Ohtani, N. Egami, H. T. Grahn, K. H. Ploog
    International Conference on Physics of Semiconductors (ICPS), (Th-P73), Aug. 1998, English, Research paper, summary (international conference)
  • Photocurrent Self-Oscillations in Undoped GaAs/AlAs Superlattices Modulated by an External AC Voltage
    N. Ohtani, N. Egami, K. Fujiwara, H. T. Grahn
    International Workshop on Nano Physics and Electronics (NEP), (L-04)95 - 96, Sep. 1997, English, Research paper, summary (international conference)
  • Influence of Γ-X Resonance on Current-Voltage Characteristics in GaAs/InAlAs Strained Superlattices
    K. Kuroyanagi, N. Ohtani, N. Egami, K. Tominaga, M. Ando, M. Nakayama
    International Conference on Solid State Devices and Materials (SSDM), (D-5-3)236 - 237, Sep. 1997, English, Research paper, summary (international conference)
  • Over 1.3 mu m continuous-wave laser emission from InGaSb quantum-dot laser diode fabricated on GaAs substrates
    N Yamamoto, K Akahane, S Gozu, N Ohtani
    APPLIED PHYSICS LETTERS, AMER INST PHYSICS, 86(20)203118 , May 2005, English
  • Photoluminescence from high Gamma-electron subbands and intersubband electroluminescence using X-Gamma carrier injection in a simple GaAs/AlAs superlattice
    C Domoto, T Nishimura, N Ohtani, K Kuroyanagi, PO Vaccaro, T Aida, H Takeuchi, M Nakayama
    JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, INST PURE APPLIED PHYSICS, 41(8)5073 - 5077, Aug. 2002, English
  • Observation of Gamma-X resonances in type-I GaAs/AlAs semiconductor superlattices: Anomaly in photoluminescence
    M Hosoda, H Mimura, N Ohtani, K Tominaga, K Fujita, T Watanabe, H Inomata, M Nakayama
    PHYSICAL REVIEW B, AMERICAN PHYSICAL SOC, 55(20)13689 - 13696, May 1997, English

Books etc

  • Introduction to semiconductor electric devices
    OHTANI Naoki
    Morikita Publishing Co., Ltd., Oct. 2019, Sole author, Japanese, Scholarly book

Conference Activities & Talks

  • Analysis of electric-field domain formations and carrier transport phenomena in GaAs/AlAs asymmetric double-quantum-well superlattices
    02 Jun. 2021, English
  • Solution-processed light-emitting diodes consisting of metal-oxide and organic-inorganic hybrid emissive thin films
    EM-NANO 2021, 01 Jun. 2021, English
  • Preparation of carbon nitride thin films alginate gel for application to water decomposition by photocatalytic effect
    K. Mizuno, N. Ohtani
    The 3rd International Symposium on Recent Progress of Energy and Environmental Photocatalysis, Nov. 2019, English, Oral presentation (general)
  • Influence of strong acid on structural and photoluminescence properties of nano-amorphous graphitic carbon nitride dispersed in nitric acid
    T. Watanabe, M. Hirai, K. Takarabe, N. Ohtani
    The 9th Asia-Pacific Workshop on Widegap Semiconductors, Nov. 2019, English, Oral presentation (general)
  • Fabrication of organic-inorganic hybrid thin films by sol-gel processusing metal-alkoxide
    R. Kasuga, N. Ohtani
    The 7th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2019), 20 Jun. 2019, English, Oral presentation (general)
  • Study of isolation method of green fluorescent pigments contained in cherry tomatoes using column chromatography
    A. Noma, N. Ohtani
    The 7th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2019), 20 Jun. 2019, English, Oral presentation (general)
  • Separation of blue fluorescent pigments contained in Fraxinus lanuginosa f. serrata using reverse-phase column chromatography and investigation of luminescent properties
    T. Ohtsu, Y. Kinoe, N. Ohtani
    The 7th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2019), 20 Jun. 2019, English, Oral presentation (general)
  • Preparation of organic-inorganic hybrid emissive thin films by sol-gel reaction using photo-curing binary crosslinking
    Y. Jitsui, N. Ohtani
    XX International Sol-Gel Conference (Sol-gel 20), Jun. 2019, English, Oral presentation (general)
  • Fabrication of nano-amorphous graphitic carbon nitride dispersion and preparation of thin films by electrostatic-spraying method
    T. Watanabe, M. Hirai, K. Takarabe, N. Ohtani
    The 7th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies} (EM-NANO 2019), Jun. 2019, English, Oral presentation (general)
  • Improvement of resistance of solution-processed ZnO Film by controlling annealing condition
    T. Nojiri, N. Ohtani
    The 7th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies} (EM-NANO 2019), Jun. 2019, English, Oral presentation (general)
  • Preparation of colloidal fluorescent quantum dot thin films by electrostatic spraying deposition
    R. Yamada, D. Kim, N. Ohtani
    Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2019), Jun. 2019, English, Oral presentation (general)
  • Photoluminescence properties of emissive polymer MEH-PPV affected by antioxidant effect of natural beta-carotene extracted from spinach
    Y. Magata, S. Imada, N. Ohtani
    Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2019), Jun. 2019, English, Oral presentation (general)
  • Fabrication of nano-amorphous graphitic carbon nitride thin film by wet process and its optical properties
    T. Watanabe, M. Hirai, K. Takarabe, N. Ohtani
    the International Workshop on Nitride Semiconductors (IWN2018), Nov. 2018, English, Poster presentation
  • Preparation of Graphitic Carbon Nitride Thin Films by Evaporating Melamine
    S. Minato, N. Ohtani
    the International Workshop on Nitride Semiconductors (IWN2018), Nov. 2018, English, Poster presentation
  • Study on extraction method of blue emissive pigments contained in fraxinus lanuginose
    Y. Kinou, N. Ohtani
    the International Conference on Organic Materials for Electronics and Photonics (KJF-ICOMEP 2018), Sep. 2018, English, Poster presentation
  • Modulation of photoluminescence properties of emissive polymers induced by mixing of beta-carotene
    S. Imada, N. Ohtani
    the International Conference on Organic Materials for Electronics and Photonics (KJF-ICOMEP 2018), Sep. 2018, English, Poster presentation
  • Fabrication and Characterization of Carbon Nitride Fluorescent Material Using Annealed Melamine
    K. Wada, N. Ohtani
    the 34th International Conference on the physics of semiconductors (ICPS34), Jul. 2018, English, Poster presentation
  • Natural dye-sensitized solar cells containing anthocyanin dyes extracted from frozen blueberry using column chromatography method
    A. Mizuno, G. Yamada, N. Ohtani
    the 7th World Conference on Photovoltaic Energy Conversion (WCPEC-7), Jun. 2018, English, Poster presentation
  • Fabrication of emissive thin films using nano-amorphous graphitic carbon nitride powders
    T. Watanabe, M. Hirai, K. Takarabe, N. Ohtani
    The 6th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2017), Jun. 2017, English, Poster presentation
  • Fabrication of Carbon Nitride-based Emissive Thin Films by Wet Process Using Annealed Melamine
    K. Wada, N. Ohtani
    The 6th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2017), Jun. 2017, English, Poster presentation
  • Blue-color photoluminescence from natural pigments extracted from Fraxinus lanuginosa
    Y. Kinou, N. Ohtani
    The 6th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2017), Jun. 2017, English, Poster presentation
  • Antioxidant effect of β-carotene and lutein isolated and purified from spinach on photoluminescence lifetime of organic emissive materials
    S. Imada, T. Ito, N. Ohtani
    The 6th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2017), Jun. 2017, English, Poster presentation
  • Carrier transport and photoluminescence properties in GaAs/AlAs asymmetric multiple-quantum well superlattices affected by resonances and scatterings between higher subband energies
    N. Ohtani, M. Hosoda
    the XXV International Materials Research Congress (IMRC), Aug. 2016, English, Oral presentation (invited, special)
  • Photoluminescence properties affected by subband resonances and scatterings in GaAs/AlAs asymmetric sevenfold multiple quantum wells
    R. Wang, K. Hada, K. Yoshida, M. Hosoda, K. Akahane, N. Ohtani
    the 33rd International Conference on the Physics of Semiconductors (ICPS2016), Jun. 2016, English, Poster presentation
  • Fabrication of organic light-emitting diodes and dye-sensitized solar cells using pigments extracted from plants
    OHTANI Naoki
    the 2015 International Electron Devices and Materials Symposium (IEDMS 2015), Nov. 2015, English, Poster presentation
  • Evaluation of Antioxidant Effect of Carotenoids Extracted from Spinach Using Column Chromatography Method for Improving Photoluminescence Lifetime of Organic Emissive Materials
    T. Ito, A. Emoto, N. Ohtani
    the 2015 KJF International Conference on Organic Materials for Electronics and Photonics (KJF-ICOMEP 2015), Sep. 2015, English, Poster presentation
  • Dye sensitized solar cells containing anthocyanin dyes extracted from frozen red cabbages
    D. Isoda, S. Togo, A. Emoto, N. Ohtani
    the 1st International Caparica Conference on Chromogenic and Emissive Materials} (IC3EM), Sep. 2014, English, Poster presentation
  • Optical properties of pigments extracted from vegetables and application to light-emitting diodes
    N. Ohtani, T. Morikawa, Y. Katano, Y. Nishida, A. Emoto
    the 25th Conference of the Condensed Matter Division of the EPS (CMD25), Aug. 2014, English, Poster presentation
  • Inorganic-organic hybrid light-emitting diodes driven by low dc voltage containing CdSe-ZnS core-shell quantum dot emitters
    N. Ohtani, Y. Hagimoto, S. Yoshikawa
    the 32nd International Conference on the Physics of Semiconductors (ICPS-32), Aug. 2014, English, Poster presentation
  • Improved light emission properties and operation lifetime of multi-layered organic light-emitting diodes using dyes extracted from spinach
    Y. Nishida, N. Ohtani
    the 8th International Symposium on Organic Molecular Electronics (ISOME 2014), May 2014, English, Poster presentation
  • High efficient carrier injection into wide-bandgap polymer emissive materials and application to light-emitting diodes operating in the ultraviolet region
    N. Ohtani, M. Takahashi
    the 18th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON18), Jul. 2013, English, Poster presentation
  • Evaluation of antioxidant effect of carotenoid extracted from plants on the operating lifetime of organic light-emitting diodes
    Y. Nishida, N. Ohtani
    the 4th International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2013), Jun. 2013, English, Poster presentation
  • Organic light-emitting diodes consisting of SiO2 active layer in which emissive organic materials are dispersed
    Y. Jitsui, S. Kimura, N. Ohtani
    the 31st International Conference on the Physics of Semiconductors (ICPS2012), Jul. 2012, English, Poster presentation
  • Transmission electron microscope observation of organic-inorganic hybrid thin active layers of light-emitting diodes
    Y. Jitsui, N. Ohtani
    the International Conference on Superlattices, Nanostructures, and Nanodevices 2012 (ICSNN2012), Jul. 2012, English, Poster presentation
  • Organic near-infrared photodiodes containing a wide-bandgap polymer and an n-type dopant in the active layer
    N. Ohtani, K. Nakajima, K. Bando
    the 4th International Conference on Optical, Optoelectronic and Photonic Materials and Applications (ICOOPMA10), Aug. 2010, English, Poster presentation
  • Excitonic Rabi oscillations in semiconductor quantum dot observed by photon echo spectroscopy
    K. Asakura, Y. Mitsumori, H. Kosaka, K. Edamatsu, K. Akahane, N. Yamamoto, M. Sasaki, N. Ohtani
    the 30th International Conference on the Physics of Semiconductors (ICPS-30), Jul. 2010, English, Poster presentation
  • Fabrication of organic light-emitting diodes using photosynthetic-pigments extracted from spinach
    N. Ohtani, N. Kitagawa, T. Matsuda
    the 3rd International Symposium on Organic and Inorganic Electronic Materials and Related Nanotechnologies (EM-NANO 2010), Jun. 2010, English, Poster presentation

Research Grants & Projects

  • Compound semiconductor photonic devices, organic electroluminescence, nano-technology

Research Seeds

  • Organic EL element activated in the ultraviolet wavelengh region
    Research Fields: Electric and Electronics, Chemicals, Nanotechnology and Materials
    Affiliation/Name: Naoki Ohtani