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Searching new operation area for QCL by Gain Mapping using NEGF

Research Project

Project/Area Number 18K04251
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Yun Joosun  国立研究開発法人理化学研究所, 開拓研究本部, 基礎科学特別研究員 (30817359)

Co-Investigator(Kenkyū-buntansha) 平山 秀樹  国立研究開発法人理化学研究所, 開拓研究本部, 主任研究員 (70270593)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsQCL / AlGaN / NEGF / Alloy disorder / Radom field / Dipole scattering / Self-energy / Random electric field / Interface roughness / Roughness-induced charge / Level broadening / GaN / GaAs / AlGaAs
Outline of Final Research Achievements

1. Dipole scattering self-energy for GaN/AlGaN superlattices were modeled, and it was utilized to investigate carrier transport based on the NEGF. By this study, it was confirmed that compositional Al ratios between 0.3 and 0.7 can highly influence the level broadening.
2. Generation of random electric field due to the roughness induced charge at the interfaces of GaN/AlGaN multiple quantum well (MQW) is reported. By this study, it is revealed that even for the 0.1 Al compositional ratio of GaN/AlGaN MQW can generate RMS random electric field over 1 MV/cm for the case of bad interface quality.

Academic Significance and Societal Importance of the Research Achievements

We step forward to clarify the carrier transport in AlGaN-based superlattices through this project's analytical and numerical calculations. Continuous research stemming from this project will help realize the unexplored frequency's terahertz laser device and high-efficiency deep-UV emitter.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (9 results)

All 2021 2019 2018 Other

All Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 3 results) Presentation (5 results) (of which Int'l Joint Research: 3 results) Remarks (1 results)

  • [Journal Article] Demonstration of High Light-Extraction Efficiency of Double-Metal Surface-Emitting Terahertz Quantum Cascade Laser with High Active Region Occupancy by Adopting Uniform Triangular Prism Photonic Crystal2021

    • Author(s)
      Joosun Yun, Tsung-Tse Lin, and Hideki Hirayama
    • Journal Title

      Journal of Lightwave Technology

      Volume: submitted

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Random electric field induced by interface roughness in GaN/AlGaN multiple quantum wells2019

    • Author(s)
      Joosun Yun, Dong-Pyo Han, and Hideki Hirayama
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 12 Pages: 124005-124005

    • DOI

      10.7567/1882-0786/ab548a

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Broadening mechanisms and self-consistent gain calculations for GaN quantum cascade laser structures2018

    • Author(s)
      Wang Ke、Grange Thomas、Lin Tsung-Tse、Wang Li、Jehn Zoltan、Birner Stefan、Yun Joosun、Terashima Wataru、Hirayama Hideki
    • Journal Title

      Applied Physics Letters

      Volume: 113 Issue: 6 Pages: 061109-061109

    • DOI

      10.1063/1.5029520

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Influence of Dipole Scattering to Level Broadening and Carrier Transport in AlGaN-based Superlattice Structures2019

    • Author(s)
      Joosun Yun and Hideki Hirayama
    • Organizer
      The 9th Asia-Pacific Workshop on Widegap Semiconductors (APWS2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Level broadening by dipole scattering in AlGaN/AlGaN superlattice structures2019

    • Author(s)
      Joosun Yun and Hideki Hirayama
    • Organizer
      Infrared Terahertz Quantum Workshop (ITQW 2019)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] GaN/AlGaN based THz-QCL taking into account an interface roughness scattering2019

    • Author(s)
      Joosun Yun and Hideki Hirayama
    • Organizer
      the 7th RAP symposium
    • Related Report
      2019 Research-status Report
  • [Presentation] Design and analysis of DUV-LEDs and QCLs by utilizing HOKUSAI2019

    • Author(s)
      Joosun Yun and Hideki Hirayama
    • Organizer
      the ALL-RIKEN workshop
    • Related Report
      2019 Research-status Report
  • [Presentation] Broadening mechanisms and self-consistent gain calculations for GaN quantum cascade laser structures2018

    • Author(s)
      Ke Wang, Tsung-Tse Lin, Li Wang, Joosun Yun, Wataru Terashima, Hideki Hirayama, Thomas Grange, Zoltan Jehn, and Stefan Birner
    • Organizer
      International Workshop on Nitride Semiconductors (IWN) 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Remarks] Design of high performance THz-QCL and DUV-LED

    • URL

      http://i.riken.jp/download/Q18381.pdf

    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-03-04  

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