Photon correlation in GaAs self-assembled quantum dots

Details Photon correlation in GaAs self-assembled quantum dots Photon correlation in GaAs self-assembled quantum dots

2008-04-16

arxiv.org/abs/0804.2515v1

Applied Physics Express 1 (2008) 042001

Physics

Condensed Matter

Other Condensed Matter

5 pages, 3 figures

Scientific paper

10.1143/APEX.1.042001

We report on photon coincidence measurement in a single GaAs self-assembled quantum dot (QD) using a pulsed excitation light source. At low excitation, when a neutral exciton line was present in the photoluminescence (PL) spectrum, we observed nearly perfect single photon emission from an isolated QD at 670 nm wavelength. For higher excitation, multiple PL lines appeared on the spectra, reflecting the formation of exciton complexes. Cross-correlation functions between these lines showed either bunching or antibunching behavior, depending on whether the relevant emission was from a biexciton cascade or a charged exciton recombination.

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