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 |
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Article number | 124101 |
Journal | Applied Physics Letters |
Volume | 88 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2006 Mar 20 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)