Comment to article "A light--hole exciton in a quantum dot" by Y.H.Huo et al, Nature Physics 10, 46 (2014)

TL;DR

This paper discusses the properties of light-hole excitons in strained quantum dots, emphasizing how strain anisotropy affects their polarization and fine structure, providing insights into their physical characteristics.

Contribution

It offers a theoretical analysis of light-hole exciton ground states in strained quantum dots, highlighting the impact of strain anisotropy on their properties.

Findings

Strain anisotropy influences the purity of the light-hole exciton state.

The in-plane polarization of emission is sensitive to strain conditions.

Fine structure of the ground state varies with strain anisotropy.

Abstract

The exciton ground state in strained quantum dots similar to those fabricated in article specified in the title is shortly discussed within a relevant model Hamiltonian. Some characteristics of the light--hole exciton ground state reached in a dot under the tensile biaxial strain appear to be sensitive to the strain anisotropy breaking a purity of this state. It refers in particular to a degree of the in--plane polarization of the emission and the fine structure of the ground state.