Study on high excitation density exciton-polariton Bose Einstein condensation

• Project/Area Number: 24740277
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Atomic/Molecular/Quantum electronics
• Research Institution: Yokohama National University (2014); National Institute of Informatics (2012-2013)
• Principal Investigator: HORIKIRI Tomoyuki 横浜国立大学, 工学(系)研究科(研究院), 准教授 (40530275)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
• Keywords: 量子光学 / 励起子ポラリトン / ボース・アインシュタイン凝縮 / 半導体マイクロ共振器 / ポラリトン凝縮 / 強結合 / 量子井戸 / マイクロ共振器 / ポラリトンレーザー / 高励起 / ボース･アインシュタイン凝縮 / 共振器量子電磁気学

Outline of Final Research Achievements

In this study, high density exciton-polariton condensation was investigated. Photoluminescence (PL) by time-resolved spectroscopy in the regime far above condensation threshold (~100 times) was observed. PL showing lower polariton energy at low densities gradually shifted toward higher energy closing to a cavity photon energy as density goes up, and a new higher energy PL peak appeared. The PL dynamics was investigated by theoretical calculations. In addition, we studied the reason of the nonexistence of a lower energy peak which had been expected while there exists a higher energy peak and found that nonequilibrium feature of the exciton-polariton system leads to the observed unbalance in the relative brightness of sidebands. The experimental and theoretical investigations led us to a conclusion that electron-hole binding in the high density regime still seems to exist.

Research Products

• [Journal Article] Photoluminescence of high-density exciton-polariton condensates (2014)
  • Author(s): N. Ishida, T. Byrnes, T. Horikiri, F. Nori, Y. Yamamoto
  • Journal Title: Physical Review B Volume: 90
  • DOI: 10.1103/physrevb.90.241304
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Temperature Dependence of Highly Excited Exciton Polaritons in Semiconductor Microcavities (2013)
  • Author(s): Tomoyuki Horikiri, Yasuhiro Matsuo, Yutaka Shikano, Andreas Loeffler, Sven Hoefling, Alfred Forchel, Yoshihisa Yamamaoto
  • Journal Title: J. Phys. Soc. Jpn. Volume: 82 Issue: 8 Pages: 084709-084709
  • DOI: 10.7566/jpsj.82.084709
  • NAID: 210000132709
  • ISSN: 0031-9015, 1347-4073
  • Peer Reviewed
• [Presentation] New Lasing From Exciton-Polariton Condensates in High Excitation Regime (2013)
  • Author(s): Tomoyuki Horikiri, Makoto Yamaguchi, Kenji Kamide, Yutaka Shikano, Yasuhiro Matsuo, Tim Byrnes, Natsuko Ishida, Andreas Löffler, Sven Höfling, Tetsuo Ogawa, Alfred Forchel, and Yoshihisa Yamamoto
  • Organizer: CLEO-PR&OECC/PS 2013
  • Place of Presentation: 京都国際会議場、京都
• [Presentation] 高密度ポラリトン凝縮系の強結合状態によるレーザー発振(2)：理論 (2013)
  • Author(s): 上出健仁，山口真，堀切智之，松尾康弘，鹿野豊，小川哲生，山本喜久
  • Organizer: 第74 回応用物理学会秋季学術講演会
  • Place of Presentation: 同志社大学、京都
• [Presentation] 高密度ポラリトン凝縮系の強結合状態によるレーザー発振(1)：実験 (2013)
  • Author(s): 堀切智之，山口真，上出健仁，松尾康弘，Andreas Loeffler, Sven Hoefling, 鹿野 豊，小川哲生，Alfred Forchel, 山本喜久
  • Organizer: 第74 回応用物理学会秋季学術講演会
  • Place of Presentation: 同志社大学、京都
• [Presentation] ストリークカメラによる励起子ポラリトン凝縮体の二次コヒーレンスの測定 (2013)
  • Author(s): 松尾康弘，堀切智之，楠戸健一郎，鹿野豊，Andreas Loeffer，Sven Hoefling，Alfred Forchel，山本喜久
  • Organizer: 日本物理学会第68回（2013年）年次大会
  • Place of Presentation: 広島大学
• [Presentation] 励起子ポラリトン凝縮体とレーザー発振の温度依存性 (2013)
  • Author(s): 堀切智之，松尾康弘, 鹿野豊，Andreas Loeffer，Sven Hoefling，Alfred Forchel，山本喜久
  • Organizer: 日本物理学会第68回（2013年）年次大会
  • Place of Presentation: 広島大学
• [Presentation] 高励起ポラリトン凝縮における負の分散観測 (2013)
  • Author(s): 堀切智之，Tim Byrnes, 楠戸健一郎，石田夏子，松尾康弘, 鹿野豊，Andreas Loeffer，Sven Hoefling，Alfred Forchel，山本喜久
  • Organizer: 日本物理学会第68回（2013年）年次大会
  • Place of Presentation: 広島大学
• [Presentation] Photoluminescence of exciton-polariton condensates in high excitation regime (2012)
  • Author(s): T. Horikiri, M. Yamaguchi, K. Kamide, Y. Shikano, T. Byrnes, K. Kusudo, N. Ishida, Y. Matsuo, A. Loeffler, S. Hoefling, T. Ogawa, A. Forchel, and Y. Yamamoto
  • Organizer: The 6th International Conference on Spontaneous Coherence in Excitonic Systems (ICSCE-6)
  • Place of Presentation: Stanford university, CA, USA
• [Presentation] Direct photoluminescence observation of the negative Bogoliubov branch in an exciton-polariton condensate (2012)
  • Author(s): Tomoyuki Horikiri, Tim Byrnes, Natsuko Ishida, Andreas Loeffler, Sven Hoefling, Alfred Forchel, Yoshihisa Yamamoto
  • Organizer: CLEO/Quantum Electronics and Laser Science Conference (QELS 2012)
  • Place of Presentation: San Jose, CA, USA
  • Invited