Journal
APPLIED PHYSICS LETTERS
Volume 103, Issue 16, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4825106
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Funding
- BMBF [01BQ1041, 01BQ1038]
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We demonstrate pronounced single-photon emission from InAs/AlGaInAs/InP quantum dots (QDs) at wavelengths above 1.5 mu m that are compatible with standard long-distance fiber communication. The QDs are grown by molecular beam epitaxy on distributed Bragg reflectors. A low QD density of about 5 x 10(8) cm(-2) was obtained using optimized growth conditions. Low-temperature micro-photoluminescence spectroscopy exhibits sharp excitonic emission lines from single QDs without the necessity of further processing steps. The combination of excitation power-dependent and polarization-resolved photoluminescence measurements reveal a characteristic exciton-biexciton behavior with biexciton binding energies that range from 3.5 to 4 meV and fine-structure splitting values down to 20 mu eV. (C) 2013 AIP Publishing LLC.
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