• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Elucidation of photoluminescence mechanism due to polariton-like spatial propagation in exciton inelastic scattering processes

Research Project

Project/Area Number 18K03494
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
Research InstitutionOsaka City University

Principal Investigator

NAKAYAMA Masaaki  大阪市立大学, 大学院工学研究科, 教授 (30172480)

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: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords励起子非弾性散乱 / 励起子-励起子散乱 / 励起子-電子散乱 / 光子性ポラリトン空間伝播 / 空間分解発光分光法 / 時間分解発光分光法 / 多重量子井戸・超格子 / 半導体薄膜 / 励起子非弾性散乱過程 / 光子性下枝ポラリトン空間伝播 / GaAs/AlAs超格子 / CuI薄膜 / 光子性下枝ポラリトン / GaAs/AlAs多重量子井戸構造 / GaAsN薄膜 / InGaN薄膜 / ポラリトン的空間伝播
Outline of Final Research Achievements

We have investigated the spatially-resolved and time-resolved photoluminescence (PL) properties of exciton inelastic scattering processes such as exciton-exciton scattering and exciton-electron scattering in various semiconductors such as GaAs/AlAs multiple quantum wells, superlattices, GaN-related thin films, ZnO thin films, and CuI thin films. We found that a PL spot appears at a sample edge and that the PL from exciton inelastic scattering is selectively observed at the sample edge. This fact indicates that the photon-like polariton, which is the final state of the inelastic scattering process, spatially propagates from an excitation spot to the sample edge, which leads to conversion to a photon by breakdown of translational symmetry at the sample edge. Furthermore, we revealed that the PL decay rate of exciton-exciton scattering can be scaled by the group velocity of the photon-like polariton.

Academic Significance and Societal Importance of the Research Achievements

励起子非弾性散乱過程(励起子-励起子散乱と励起子-電子散乱)は、レーザー発振の起源となる誘導放出(光増幅)が生じる光学過程として1970年代中頃から現在に至るまで盛んに研究が行われてきた。しかし、励起子非弾性散乱過程の本質的な特性である発光過程のポラリトン性(励起子と光子の混成状態の特性)については、明らかではなかった。本研究成果の学術的意義は、発光過程の終状態である光子性ポラリトンの空間伝播が、励起子非弾性散乱による発光過程を支配していることを空間分解発光特性と時間分解発光特性の観点から明らかにしたことであり、発光過程を制御するための重要な知見を提示するものである。

Report

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

    (15 results)

All 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (12 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Temperature dependence of photoluminescence dynamics of exciton-exciton inelastic scattering in a GaAs/AlAs multiple-quantum-well structure2019

    • Author(s)
      Yuichiro Miyazaki, Masaaki Nakayama
    • Journal Title

      Journal of Physics: Conference Series

      Volume: 1220 Issue: 1 Pages: 012026-012026

    • DOI

      10.1088/1742-6596/1220/1/012026

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Spatially-Resolved Photoluminescence Study of Temperature Dependence of Exciton Inelastic Scattering Processes in a ZnO Thin Film2019

    • Author(s)
      Masaaki Nakayama, Yojiro Nakayama
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 88 Issue: 8 Pages: 083706

    • DOI

      10.7566/jpsj.88.083706

    • NAID

      40021971773

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2020042

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evidence for Spatial Propagation of Photon-like Polaritons Generated by Exciton–Exciton Scattering in a GaAs/AlAs Multiple-Quantum-Well Structure2018

    • Author(s)
      Yoshiaki Furukawa and Masaaki Nakayama
    • Journal Title

      J. Phys. Soc. Jpn.

      Volume: 87 Issue: 9 Pages: 094718

    • DOI

      10.7566/jpsj.87.094718

    • NAID

      120006727809

    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2020041

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] GaAs/AlAs超格子における励起子-励起子散乱発光のポラリトン特性2020

    • Author(s)
      矢萩拓、中山正昭
    • Organizer
      日本物理学会2020年秋季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] GaAs/AlAs超格子における励起子-励起子散乱発光の時間・空間分解特性2020

    • Author(s)
      矢萩拓、中山正昭
    • Organizer
      第31回光物性研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] GaN薄膜における励起子-電子散乱発光の空間分解特性2020

    • Author(s)
      天見亮太、中山正昭
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] CuI薄膜における励起子-励起子散乱発光のポラリトン的空間伝播特性2019

    • Author(s)
      堂柿良介、中山正昭
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] GaN薄膜における励起子-電子散乱発光のポラリトン的空間伝播特性2019

    • Author(s)
      天見亮太、中山正昭
    • Organizer
      第30回光物性研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] CuI薄膜における励起子-励起子散乱発光の時間・空間分解特性2019

    • Author(s)
      堂柿良介、中山正昭
    • Organizer
      第30回光物性研究会
    • Related Report
      2019 Research-status Report
  • [Presentation] 希薄窒化物混晶GaAsN薄膜における励起子-励起子散乱発光のポラリトン的空間伝播特性2019

    • Author(s)
      松野友洋、中山正昭
    • Organizer
      日本物理学会第74回年次大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Temperature dependence of photoluminescence dynamics of exciton-exciton inelastic scattering in a GaAs/AlAs multiple-quantum-well structure2018

    • Author(s)
      Yuichiro Miyazaki and Masaaki Nakayama
    • Organizer
      The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 希薄混晶InGaN薄膜における励起子-励起子散乱発光ダイナミクスのポラリトン特性2018

    • Author(s)
      天見亮太、中山正昭
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] GaAs/AlAs多重量子井戸構造における空間分解励起子-励起子散乱発光スペクトルの微細構造2018

    • Author(s)
      古川喜彬、中山正昭
    • Organizer
      日本物理学会2018年秋季大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 希薄混晶InGaN薄膜における励起子-励起子散乱発光ダイナミクスのポラリトン特性2018

    • Author(s)
      天見亮太、中山正昭
    • Organizer
      第29回光物性研究会
    • Related Report
      2018 Research-status Report
  • [Presentation] GaAs/AlAs多重量子井戸構造における励起子-励起子散乱発光減衰プロファイルの温度依存性2018

    • Author(s)
      宮崎雄一郎、中山正昭
    • Organizer
      第29回光物性研究会
    • Related Report
      2018 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi