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arXiv · 1612.03585

Polarization anisotropy of the emission from type-II quantum dots

P. Klenovsky·D. Hemzal·P. Steindl·M. Zikova·V. Krapek·J. Humlicek
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Abstract

We study the polarization response of the emission from type-II GaAsSb capped InAs quantum dots. The theoretical prediction based on the calculations of the overlap integrals of the single-particle states obtained in the k.p framework is given. This is verified experimentally by polarization resolved photoluminescence measurements on samples with the type-II confinement. We show that the polarization anisotropy might be utilized to find the vertical position of the hole wavefunction and its orientation with respect to crystallographic axes of the sample. A proposition for usage in the information technology as a room temperature photonic gate operating at the communication wavelengths as well as a simple model to estimate the energy of fine-structure splitting for type-II GaAsSb capped InAs QDs are given.

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P. Klenovsky, D. Hemzal, P. Steindl, M. Zikova, V. Krapek, J. Humlicek. 2016-12-12. Polarization anisotropy of the emission from type-II quantum dots. https://doi.org/10.1103/physrevb.92.241302

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