Single-Photon Emission from a Highly Excited CdTe Quantum Dot
S. Nowak, M. Goryca, T. Kazimierczuk, J.A. Gaj, A. Golnik, P. Kossacki
Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warszawa, Poland
P. Wojnar and G. Karczewski
Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warszawa, Poland
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Received: 7 06 2008;
Time-resolved correlation measurements were performed to examine the statistics of photon emission from a single quantum dot at high excitation levels. The range of strong powers was determined by the saturation of intensity of excitonic lines. The significant contribution of pulsed background luminescence forced us to sophisticated analysis of the photoluminescence spectra. For quantum dots grown in the Stranski-Krastanov mode, one-photon emission was found to a good approximation. Fluctuation type quantum dots exhibit a significant level of multiphoton emission.
DOI: 10.12693/APhysPolA.114.1273
PACS numbers: 73.21.La, 78.55.Et, 78.67.-n, 78.47.-p