Journal
APPLIED PHYSICS LETTERS
Volume 99, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3670040
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- Thaksin University in Thailand
- Swedish Research Council (VR)
- Swedish Foundation for Strategic Research (SSF)
- Knut and Alice Wallenberg Foundation
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Single GaN/Al(Ga)N quantum dots (QDs) have been investigated by means of microphotoluminescence. Emission spectra related to excitons and biexcitons have been identified by excitation power dependence and polarization resolved spectroscopy. All investigated dots exhibit a strong degree of linear polarization (similar to 90%). The biexciton binding energy scales with the dot size. However, both positive and negative binding energies are found for the studied QDs. These results imply that careful size control of III-Nitride QDs would enable the emission of correlated photons with identical frequencies from the cascade recombination of the biexciton, with potential applications in the area of quantum information processing. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3670040]
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