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American Institute of Physics, Applied Physics Letters, 6(101), p. 061910

DOI: 10.1063/1.4742343

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Dynamic characteristics of the exciton and the biexciton in a single InGaN quantum dot

Journal article published in 2012 by Supaluck Amloy, Evgenii S. Moskalenko, M. Eriksson, K. Fredrik Karlsson, Y. T. Chen ORCID, K. H. Chen, H. C. Hsu, C. L. Hsiao, L. C. Chen, Per-Olof Holtz
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This paper is available in a repository.

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Abstract

The dynamics of the exciton and the biexciton related emission from a single InGaN quantum dot (QD) have been measured by time-resolved microphotoluminescence spectroscopy. An exciton-biexciton pair of the same QD was identified by the combination of power dependence and polarization-resolved spectroscopy. Moreover, the spectral temperature evolution was utilized in order to distinguish the biexciton from a trion. Both the exciton and the biexciton related emission reveal mono-exponential decays corresponding to time constants of similar to 900 and similar to 500 ps, respectively. The obtained lifetime ratio of similar to 1.8 indicates that the QD is small, with a size comparable to the exciton Bohr radius. ; Funding Agencies|Thaksin University in Thailand||Swedish Research Council (VR)||Swedish Foundation for Strategic Research (SSF)||Knut and Alice Wallenberg Foundation||