Tuning the inter-shell splitting in self-assembled CdTe quantum dots

Details Tuning the inter-shell splitting in self-assembled CdTe quantum dots Tuning the inter-shell splitting in self-assembled CdTe quantum dots

2011-08-03

arxiv.org/abs/1108.0820v1

Appl. Phys. Lett 99, 141906 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

submitted to Applied Physics Letters

Scientific paper

10.1063/1.3643476

We present photoluminescence studies of highly excited single self--assembled CdTe quantum dots under continuous--wave and pulsed excitations. We observe appearance of emission bands related to sequential filling of s--, p-- and d--shells. We analyze the inter-shell splitting for five samples, in which the dots were formed from a strained CdTe layer of different width. We find that with increasing the CdTe layer width the inter-shell splitting increases. In a time resolved measurement, we observe a radiative cascade between transitions involving one, two, and more than two excitons.

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