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

doi:10.1103/PhysRevB.72.155307

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

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

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.

Original language	English
Article number	155307
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	72
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevB.72.155307
Publication status	Published - 2005 Oct 15
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Excitonic molecule in a quantum dot : Photoluminescence lifetime of a single InAs GaAs quantum dot. / Kono, Shunsuke; Kirihara, Akihiro; Tomita, Akihisa; Nakamura, Kazuo; Fujikata, Junichi; Ohashi, Keishi; Saito, Hideaki; Nishi, Kenichi.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 72, No. 15, 155307, 15.10.2005.

Research output: Contribution to journal › Article › peer-review

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AU - Ohashi, Keishi

AU - Saito, Hideaki

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