Features of Multilayer CdTe/ZnTe Quantum Dot Structures: Optical Studies

Bagaev, Victor S.; Onishchenko, Evgeny E.
June 2005
AIP Conference Proceedings;2005, Vol. 772 Issue 1, p755
Academic Journal
Studies of multilayer CdTe/ZnTe quantum-dot (QD) structures with different thickness of ZnTe spacer layer grown on a thick CdTe buffer layer have been carried out by optical spectroscopy methods. A complicated strain-distribution pattern within the structure with the thinnest ZnTe spacer layer (12 monolayers) result in a situation when an additional luminescence band appearing in the emission spectrum of the structrure is likely caused by the spatially indirect excitons. The analysis of photoluminescence temperature dependence allows us to conclude that a rather intense exciton migration within the ordered QD clusters (presenting in the structure) takes place already at temperatures of few tens of Kelvin. © 2005 American Institute of Physics


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