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arXiv · 1108.0820

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

Krzysztof Kukliński·Łukasz Kłopotowski·Krzysztof Fronc·Maciej Wiater·Piotr Wojnar·Paweł Rutkowski·Valia Voliotis·Roger Grousson·Grzegorz Karczewski·Jacek Kossut·Tomasz Wojtowicz
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Abstract

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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Krzysztof Kukliński, Łukasz Kłopotowski, Krzysztof Fronc, Maciej Wiater, Piotr Wojnar, Paweł Rutkowski, Valia Voliotis, Roger Grousson, Grzegorz Karczewski, Jacek Kossut, Tomasz Wojtowicz. 2011-08-03. Tuning the inter-shell splitting in self-assembled CdTe quantum dots. https://doi.org/10.1063/1.3643476

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