Excitonic and biexcitonic decoherence in self-assembled GaAs quantum dots as observed by phase-locked interferography

K. Kuroda; T. Kuroda; K. Sakoda; K. Watanabe; N. Koguchi; G. Kido

doi:10.1063/1.2187441

Excitonic and biexcitonic decoherence in self-assembled GaAs quantum dots as observed by phase-locked interferography

K. Kuroda, T. Kuroda, K. Sakoda, K. Watanabe, N. Koguchi, G. Kido

High Field Laboratory for Superconducting Materials

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

27 Citations (Scopus)

Abstract

We observe single-photon interferograms for emission of a single self-assembled GaAs quantum dot. A phase stabilizer is applied to the interferometer, enabling us to trace autocorrelations of weak emissions with a photon-counting level. At low excitation, where the average number of excitons in a dot is less than one, interferography reveals a single exponential decay, reflecting excitonic decoherence. At moderately high excitation, polarization interference between the exciton-biexciton transitions is found to appear on the interferogram. The decoherence time and the binding energy of biexcitons are determined simultaneously.

Original language	English
Article number	124101
Journal	Applied Physics Letters
Volume	88
Issue number	12
DOIs	https://doi.org/10.1063/1.2187441
Publication status	Published - 2006 Mar 20

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Excitonic and biexcitonic decoherence in self-assembled GaAs quantum dots as observed by phase-locked interferography",

abstract = "We observe single-photon interferograms for emission of a single self-assembled GaAs quantum dot. A phase stabilizer is applied to the interferometer, enabling us to trace autocorrelations of weak emissions with a photon-counting level. At low excitation, where the average number of excitons in a dot is less than one, interferography reveals a single exponential decay, reflecting excitonic decoherence. At moderately high excitation, polarization interference between the exciton-biexciton transitions is found to appear on the interferogram. The decoherence time and the binding energy of biexcitons are determined simultaneously.",

author = "K. Kuroda and T. Kuroda and K. Sakoda and K. Watanabe and N. Koguchi and G. Kido",

note = "Funding Information: We would like to thank T. Mano, T. Ochiai, and J. Inoue for their fruitful discussions. T. K. acknowledges a support of Grant-in-Aid from MEXT. ",

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T1 - Excitonic and biexcitonic decoherence in self-assembled GaAs quantum dots as observed by phase-locked interferography

AU - Kuroda, K.

AU - Kuroda, T.

AU - Sakoda, K.

AU - Watanabe, K.

AU - Koguchi, N.

AU - Kido, G.

N1 - Funding Information: We would like to thank T. Mano, T. Ochiai, and J. Inoue for their fruitful discussions. T. K. acknowledges a support of Grant-in-Aid from MEXT.

PY - 2006/3/20

Y1 - 2006/3/20

N2 - We observe single-photon interferograms for emission of a single self-assembled GaAs quantum dot. A phase stabilizer is applied to the interferometer, enabling us to trace autocorrelations of weak emissions with a photon-counting level. At low excitation, where the average number of excitons in a dot is less than one, interferography reveals a single exponential decay, reflecting excitonic decoherence. At moderately high excitation, polarization interference between the exciton-biexciton transitions is found to appear on the interferogram. The decoherence time and the binding energy of biexcitons are determined simultaneously.

AB - We observe single-photon interferograms for emission of a single self-assembled GaAs quantum dot. A phase stabilizer is applied to the interferometer, enabling us to trace autocorrelations of weak emissions with a photon-counting level. At low excitation, where the average number of excitons in a dot is less than one, interferography reveals a single exponential decay, reflecting excitonic decoherence. At moderately high excitation, polarization interference between the exciton-biexciton transitions is found to appear on the interferogram. The decoherence time and the binding energy of biexcitons are determined simultaneously.

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