Exciton dephasing in strain-compensated self-assembled InAs quantum dots

Junko Ishi-Hayase, Kouichi Akahane, Naokatsu Yamamoto, Mamiko Kujiraoka, Kazuhiro Ema, Masahide Sasaki

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

We investigate the dephasing of excitons in InAs self-assembled quantum dots by using a transient four-wave-mixing technique. A used sample is specially designed to compensate the strain. We observe long-lived coherence of excitons at 5 K which corresponds to the dephasing time longer than a nanosecond, where the photon energy of the excitation pulse is 0.874 eV. We find that a pure dephasing due to exciton-phonon interactions dominates in the exciton dephasing rather than the population decay and the exciton-exciton interaction in the weak excitation region, by analyzing the population lifetime and the polarization-dependent dephasing time. quantum dot, strain compensation, dephasing, four-wave mixing, population lifetime, optical anisotropy.

本文言語English
ホスト出版物のタイトルPhysics and Simulation of Optoelectronic Devices XIV
DOI
出版ステータスPublished - 2006 5 22
外部発表はい
イベントPhysics and Simulation of Optoelectronic Devices XIV - San Jose, CA, United States
継続期間: 2006 1 222006 1 26

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
6115
ISSN(印刷版)0277-786X

Other

OtherPhysics and Simulation of Optoelectronic Devices XIV
国/地域United States
CitySan Jose, CA
Period06/1/2206/1/26

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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