MUKAI Kohki

Affiliation

Faculty of Engineering, Division of Systems Research

Job Title

Professor

Date of Birth

1963

Mail Address

E-mail address

Related SDGs




ORCID  https://orcid.org/0000-0002-1334-6604

写真a

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The Best Research Achievement in Research Career 【 display / non-display 】

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The Best Research Achievement in the last 5 years 【 display / non-display 】

  • 【Published Thesis】 Photon generator combined with silica-coated quantum dot and metamaterial fabricated by the scanning probe microscope lithography  2020.04

    【Published Thesis】 Chemical synthesis and band gap control of Ga2O3:Co nanocrystals  2019.03

    【Published Thesis】 Superlattice formation of faceted PbS quantum dots with three-dimensionally aligned crystal orientation  2018.07

    【Published Thesis】 All-silicon photon emitter with colloidal PbS quantum dot in tunable microcavity  2018.09

    【Published Thesis】 Controlling The Electron Coupled State in The Superlattice of PbS Quantum Dots by Replacing Ligands  2017.05

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Graduating School 【 display / non-display 】

  • 　
    -
    1986

    Kyoto University   Faculty of Science   Graduated

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Degree 【 display / non-display 】

  • Doctor of Engineering -  Kyoto University

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Campus Career 【 display / non-display 】

  • 2017.04
    -
    Now

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Systems Research   Professor  

  • 2009.04
    -
    2017.03

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Materials Science and Chemical Engineering   Professor  

  • 2007.04
    -
    2009.03

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Materials Science and Chemical Engineering   Associate Professor  

  • 2003.04
    -
    2007.03

    Duty   Yokohama National UniversityFaculty of Engineering   Division of Materials Science and Chemical Engineering   Associate Professor  

  • 2018.04
    -
    Now

    Concurrently   Yokohama National UniversityGraduate school of Engineering Science   Department of Mechanical Engineering, Materials Science and Ocean Engineering   Professor  

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Academic Society Affiliations 【 display / non-display 】

  • 2019.12
    　
    　
     

    Material Research Society

  • 　
    　
    　
     

    The Institute of Pure and Applied Physics (IPAP)

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Field of expertise (Grants-in-aid for Scientific Research classification) 【 display / non-display 】

  • Electronic materials/Electric materials

  • Electron device/Electronic equipment

  • Thin film/Surface and interfacial physical properties

  • Applied materials

  • Optical engineering, Photon science

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Qualification acquired 【 display / non-display 】

  • X-ray Work Chief Person

  • Organic Solvent Work Chief Person

  • Specified Chemical Substances Work Chief

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Books 【 display / non-display 】

  • Self-assembled quantum dot structure composed of III-V compound semiconductors

    (Part： Joint Work )

    Nano and Micro Materials, Springer  2008

  • Self-Assembled InGaAs/GaAs Quantum Dots

    (Part： Joint Work )

    Semiconductors and Semimetals (Academic Press, New York)  1999

  • Semiconductor Quantum Well Intermixing : Material Properties and Optoelectronic Applications

    (Part： Joint Work )

    Gordon & Breach, Amsterdam  1999

  • Self-Assembled InGaAs/GaAs Quantum Dots

    (Part： Joint Work )

    Academic Press, New York  1999

  • Interdiffusion in Lattice-Matched Quantum Wells and Self-Formed Quantum Dots Composed of III-V Semiconductors

    (Part： Joint Work )

    Optoelectronic Properties of Semiconductors and Superlattices, Gordon & Breach, Amsterdam  1999

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Thesis for a degree 【 display / non-display 】

  • Growth and Characterization of Self-Assembled InGaAs/GaAs Quantum Dots and Their Application to Lasers

    向井　剛輝 

      2000.09  [Refereed]

    Doctoral Thesis   Single Work

    　View Summary

    京都大学博士(工学)工学研究科 電子工学専攻 論工博第３５４１号 本博士論文の目的は、1)InGaAs量子ドットの自己形成現象（特に通信用波長である1.3ミクロンで発光する量子ドットについて）、2)自己形成量子ドットの基礎的な光学物性、3)自己形成量子ドットの半導体レーザへのsuccessfulな応用、を示すことにある。本研究開始時には量子ドットの自己形成現象は未だ発見されていなかったが、現在では自己形成量子ドットを用いたレーザが、いくつかの特性において量子井戸レーザと肩を並べるまでになった。筆者は、この分野におけるいくつかの重要な発展に貢献した。まず、自己形成量子ドットが一般に知られる以前に、筆者は独自にInGaAs/GaAs量子ドットの自己形成現象を発見した。そのドットの発光波長は1.3や1.5ミクロンの実用波長をカバーし、通常のStranski-Krastanov (SK)タイプのドットとは異なることが後に分かった。SKドットより高均一なそのドットを用いて、初めてドット内部の離散準位からの発光を観測した。また、その離散準位間のフォノンボトルネック(PB)現象（エネルギ保存則を満たすフォノンが無いことに起因する、準位間キャリア緩和レートの低下）を早い段階で実験的に検証した。提案した新しいモデルによって量子ドット固有のフォトルミネッセンス (PL)減衰曲線を再現し、PB現象を定量的に評価した。また筆者は、量子ドットレーザのミリアンペアでの室温発振を実現し、さらに、世界で初めての（光通信波長帯の）1.3ミクロンにおける室温連続発振を達成した。

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Papers 【 display / non-display 】

  • Long carrier lifetime in faceted PbS quantum dot superlattice fabricated by sedimentation method

    Mukai Kohki, Kimura Ryota, Sugisaki Shunta, Sugimoto Takuya, Fujishima Masanobu, Watanabe Sui

    JAPANESE JOURNAL OF APPLIED PHYSICS   59   SGGH01-1 - SGGH01-6   2020.04  [Refereed]

    Joint Work

    Web of Science DOI

  • Photon generator combined with silica-coated quantum dot and metamaterial fabricated by the scanning probe microscope lithography

    Mukai Kohki, Sugimoto Takuya, Sugisaki Shunta, Ikeda Kosuke, Watanabe Sui

    JAPANESE JOURNAL OF APPLIED PHYSICS   59   SGGH06-1 - SGGH06-8   2020.04  [Refereed]

    Joint Work

    Web of Science DOI

  • Modulation of the optical absorption edge of epsilon- and kappa - Ga2O3 due to Co impurities caused by band structure changes: Work function measurements and first-principle calculations

    Yamanaka K., Raebiger H., Mukai K., Shudo K.

    JOURNAL OF APPLIED PHYSICS   127 ( 6 )   065701   2020.02  [Refereed]

    Joint Work

    Web of Science DOI

  • Extended carrier lifetime of faceted PbS quantum dots in superlattice film formed by sedimentation method

    Kohki Mukai, Ryota Kimura, Shunta Sugisaki, Takuya Sugimoto, and Masanobu Fujishima

    abs. of Material Research Society (MRS) Fall Meeting     2019.12

    Single Work

  • Solid-state photon generator of silica-coated quantum dot combined with metamaterial fabricated by the scanning probe microscope lithography

    T. Sugimoto, S. Sugisaki, S. Watanabe, K. Mukai,

    International Conference on Solid State Devices and Materials (PS-8-03) ( Solid State Devices and Materials (PS-8-03) )    2019.09

    Joint Work

    　View Summary

    Poster Session (13:00-15:00) Toyoda Auditorium 08: Low Dimensional Devices and Materials

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Review Papers 【 display / non-display 】

  • Special Issue “Superlattice Devices"

    Kohki Mukai

        2019.07

    Introduction and explanation (commerce magazine)   Single Work

  • Effect of phonon bottleneck on quantum-dot laser performance

    proc. 16th Electronic Materials Symposium     1997.07

    Introduction and explanation (others)   Joint Work

  • Effect of phonon bottleneck on quantum-dot laser performance

    proc. 16th Electronic Materials Symposium     1997.07

    Introduction and explanation (others)   Joint Work

  • Self-Organized In0.5Ga0.5As Quantum Dots on GaAs Substrate Emitting at 1.3 um

    proc. 13th Electronic Materials Symposium     1994.07

    Introduction and explanation (others)   Joint Work

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Industrial Property 【 display / non-display 】

  • Semiconductor Device with Quantum Dots Having High Carrier Injection Efficiency, Its Manufacture Method, and Semiconductor Laser Device

    Patent No US 6751243

    Koki Mukai

  • Optical Signal Processing Device, Optical Demultiplexer, Wavelength Converting Device, Optical Processing Method, and Wavelength Converting Method

    Patent No US 6760524

    Kohki Mukai

  • Optical Switch Using Multimode Interferometer, and Optical Demultiplexer

    Patent No US 6771847

    Kohki Mukai

  • Semiconductor Device and Method of Manufacturing The Same

    Patent No US 6507042

    Kohki Mukai, Hiroshi Ishikawa

  • Epitaxial Layer Capable of Exceeding Critical Thickness

    Patent No US 6639254

    Koki Mukai, Mitsuru Sugawara

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Grant-in-Aid for Scientific Research 【 display / non-display 】

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2018.04  -  2021.03 

  • Grant-in-Aid for Scientific Research(B)

    Project Year： 2012.04  -  2015.03 

  • Grant-in-Aid for Scientific Research(C)

    Project Year： 2008.04  -  2011.03 

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Presentations 【 display / non-display 】

  • Methods for controlling colloidal quantum dots for future optoelectronics

    Kohki Mukai

    20th World Summit on Nanotechnology and Expo (nanotek-2018)  (Los Angeles, California, USA )  2018.10.05  

  • Template method used for position control of individual silica-coated quantum dot and formation of quantum-dot perfect superlattice (invited )",

    Kohki Mukai

    4th World Congress on Materials Science & Engineering (Materials Science Congress-2018)  (London, UK)  2018.08.13  

  • Colloidal Quantum-Dot Superlattice for Solar Cell Application

    Kohki Mukai

    APSMR 2018 Annual Meeting (Asia Pacific Society for Materials Research)  (Hokkaido, Japan)  2018.07.19  

  • Template method for individual positioning and dense packing of colloidal quantum dot for optoelectronic device application

     [Invited]

    IUMRS-ICAM 2017 (International Conference on Advanced Materials 2017)  2017.09.01   MRS-J

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