Photoluminescene decay time of the exciton-exciton scattering in a semiconductor thin film

• Project/Area Number: 24560011
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Applied materials science/Crystal engineering
• Research Institution: Nippon Bunri University (2014); Osaka University (2012-2013)
• Principal Investigator: ICHIDA Hideki 日本文理大学, 工学部, 特任准教授 (50379129)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2013: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000); Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 励起子ポラリトン / 励起子ｰ励起子散乱 / 時間分解発光スペクトル / 時間分解発光ダイナミクス / 励起子 / ポラリトン / 発光寿命 / 励起子－励起子散乱

Outline of Final Research Achievements

We have investigated the mechanism of the photoluminescence-decay time of the exciton-exciton scattering so-called P emission in semiconductor thin films from the viewpoint of the photon-like polariton state which is created by the exciton-exciton scattering process, and located the lower energy region of the bottle neck in the exciton-polariton picture. From the analysis of the time-resolved photoluminescence spectra observed in the ZnO thin files under the high-density excitation conditions, we have obtained the results that the decay time of the PL band of the exciton-exciton scattering becomes faster with decreasing film thickness. From the analysis of the experimental results, we find that the decay time of the photoluminescence of the exciton-exciton scattering is governed by the conversion time from the exciton state to the polariton state．

Research Products

• [Journal Article] Emission-energy dependence of ultrafast P-emission decay in ZnO from bulk to nanofilm (2014)
  • Author(s): Shuji Wakaikia, Hideki Ichida, Motoaki Bamba, Toshiki Kawase, Masaki Kawakami, Kohji Mizoguchi, DaeGwi Kim, Masaaki Nakayama, Yasuo Kanematsu
  • Journal Title: Journal of Luminescence Volume: 152 Pages: 250-253
  • DOI: 10.1016/j.jlumin.2013.12.024
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Slow propagation of photon-like polaritons generated by exciton-exciton scattering in ZnO thin films (2013)
  • Author(s): H. Ichida, S. Wakaiki, K. Mizoguchi, D. Kim, Y. Kanematsu, M. Nakayama
  • Journal Title: The European Physical Journal Web of Conferences Volume: 41 Pages: 04014-04014
  • DOI: 10.1051/epjconf/20134104014
  • Peer Reviewed
• [Journal Article] Thickness dependence of photoluminescence-decay profiles of exciton-exciton scattering in ZnO thin films (2013)
  • Author(s): S. Wakaiki, H. Ichida, T. Kawase, K. Mizoguchi, D. Kim, M. Nakayama, and Y. Kanematsu
  • Journal Title: The European Physical Journal B Volume: 86 Issue: 9
  • DOI: 10.1140/epjb/e2013-30631-5
  • Peer Reviewed
• [Journal Article] Photoluminescence Dynamics from Exciton-exciton Scattering and Exciton-electron Scattering in GaN Thin Film (2012)
  • Author(s): S. Wakaiki, H. Tokumaru, H. Ichida, K. Mizoguchi, D. G. Kim, Y. Kanematsu, M. Nakayama
  • Journal Title: physica status solidi (c) Volume: 9 Issue: 12 Pages: 2497-2500
  • DOI: 10.1002/pssc.201200316
  • Peer Reviewed
• [Presentation] P-emission decay in ZnO from bulk to nanofilm (2014)
  • Author(s): Motoaki Bamba, Shuji Wakaikia, Hideki Ichida, Masaki Kawakami, Kohji Mizoguchi, DaeGwi Kim, Masaaki Nakayama, Yasuo Kanematsu
  • Organizer: ICSCE-7, The 7th International Conference on Spontaneous Coherence in Excitonic Systems
  • Place of Presentation: Hakone, Japan
  • Year and Date: 2014-08-21 – 2014-08-25
• [Presentation] ZnO 薄膜における励起子-励起子散乱発光ダイナミクスの膜厚依存性 (2014)
  • Author(s): 若生周治，市田秀樹，馬場基彰、川瀬稔貴、川上将輝、溝口幸司，金大貴，中山正昭、兼松泰男
  • Organizer: 日本物理学会 第69回年次大会
  • Place of Presentation: 東海大学
• [Presentation] Peculiar thickness-dependent behavior of the ultrafast P-emission dynamics for ZnO thin films. I (2013)
  • Author(s): Shuji Wakaiki, Hideki Ichida, Toshiki Kawase, Masaki Kawakami, Motoaki Bamba, Kohji Mizoguchi, DaeGwi Kim, Masaaki Nakayama, and Yasuo Kanematsu
  • Organizer: 18th International Conference on Dynamical Processes in Excited States of Solids (DPC'13)
  • Place of Presentation: Fuzhou, China
• [Presentation] Photoluminescence dynamics originating from exciton-exciton and exciton-electron scattering in a GaN thin film
  • Author(s): Shuji Wakaiki,Hitoshi Tokumaru, Hideki Ichida, Kohji Mizoguchi, DaeGwi Kim, Yasuo Kanematsu, Masaaki Nakayama
  • Organizer: Fifth International Conference on Optical, Optoelectronic and Photonic Materials and Applications
  • Place of Presentation: Nara, Japan
• [Presentation] Thickness dependence of photoluminescence-decay profiles of exciton-exciton scattering in ZnO thin films
  • Author(s): Shuji Wakaiki, Hideki Ichida, Toshiki Kawase, Kohji Mizoguchi, DaeGwi Kim, Masaaki Nakayama, and Yasuo Kanematsu
  • Organizer: The 10th International Conference on Excitonic Processes in Condensed Matter, Nanostructured and Molecular Materials
  • Place of Presentation: Groningen, Netherlands
• [Presentation] ZnO 薄膜における励起子-励起子散乱発光の時間分解発光特性
  • Author(s): 若生周治，市田秀樹，川瀬稔貴，川上将輝，溝口幸司，金大貴，中山正昭，兼松泰男
  • Organizer: 日本物理学会，第68回年次大会
  • Place of Presentation: 広島大学（広島県）