Carrier trapping in a quantum dash: optical signatures

TL;DR

This paper theoretically investigates how geometrical fluctuations in quantum dashes influence their optical properties, specifically absorption intensities and polarization, revealing the impact of shape variations on excitonic spectra.

Contribution

It provides a detailed analysis of how geometrical parameters affect optical signatures in quantum dashes, highlighting the role of shape fluctuations on excitonic behavior.

Findings

Absorption intensities depend on the depth and length of the trapping center.

Linear polarization degree varies with geometrical parameters.

Geometrical fluctuations significantly influence optical signatures.

Abstract

We theoretically study the optical properties and the electronic structure of highly elongated quantum dots (quantum dashes) and show how geometrical fluctuations affect the excitonic spec- trum of the system. The dependence of the absorption intensities on the geometrical properties (depth and length) of the trapping center in a quantum dash is analyzed and the dependence of the degree of the linear polarization on these geometrical parameters is studied.