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 journalArticle

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 languageEnglish
Article number155307
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number15
DOIs
Publication statusPublished - 2005 Oct 15
Externally publishedYes

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Excitons
Semiconductor quantum dots
Photoluminescence
quantum dots
excitons
photoluminescence
life (durability)
Molecules
molecules
time dependence
indium arsenide
gallium arsenide
LDS 751
Spectroscopy
radii
decay
spectroscopy
excitation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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 journalArticle

Kono, Shunsuke ; Kirihara, Akihiro ; Tomita, Akihisa ; Nakamura, Kazuo ; Fujikata, Junichi ; Ohashi, Keishi ; Saito, Hideaki ; Nishi, Kenichi. / Excitonic molecule in a quantum dot : Photoluminescence lifetime of a single InAs GaAs quantum dot. In: Physical Review B - Condensed Matter and Materials Physics. 2005 ; Vol. 72, No. 15.
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