Excitonic molecule in a quantum dot: Photoluminescence lifetime of a single InAs GaAs quantum dot

Shunsuke Kono, Akihiro Kirihara, Akihisa Tomita, Kazuo Nakamura, Junichi Fujikata, Keishi Ohashi, Hideaki Saito, Kenichi Nishi

研究成果: Article

15 引用 (Scopus)

抜粋

Time dependence of the photoluminescence (PL) attributed to the exciton and biexciton in a single InAs GaAs quantum dot is investigated at 4.3K with microscopic spectroscopy. Dynamical behavior of the PL decay and the excitation intensity dependence of the exciton and biexciton PL are analyzed by rate equations assuming a cascading recombination from the biexciton to exciton state. The analysis shows that the biexciton lifetime is longer than the exciton lifetime. The estimated ratio of the biexciton lifetime to the exciton lifetime shows a molecular nature of the biexciton in the large quantum dots compared with the exciton Bohr radius.

元の言語English
記事番号155307
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
72
発行部数15
DOI
出版物ステータスPublished - 2005 10 15
外部発表Yes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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