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

Research output: Contribution to journalArticlepeer-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 languageEnglish
Article number124101
JournalApplied Physics Letters
Volume88
Issue number12
DOIs
Publication statusPublished - 2006 Mar 20

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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