Two-step model versus one-step model of the inter-polarization conversion and statistics of CdSe/ZnSe quantum dot elongations

TL;DR

This paper investigates magneto-optical polarization conversions in CdSe/ZnSe quantum dots, comparing one-step and two-step models of spin evolution to explain experimental polarization responses influenced by magnetic field and dot elongation.

Contribution

It introduces a comparative analysis of one-step and two-step models for inter-polarization conversion in quantum dots, incorporating quantum dot elongation statistics into the models.

Findings

Experimental polarization responses vary with magnetic field and orientation.

Two models provide different explanations for the observed polarization behaviors.

Model predictions align with experimental data when dot elongation distribution is considered.

Abstract

The magneto-optical inter-polarization conversions by a layer of quantum dots have been investigated. Various types of polarization response of the sample were observed as a function of external magnetic field and of the orientation of the sample. The full set of experimental dependences is analyzed in terms of a one-step and a two-step model of spin evolution. The angular distribution of the quantum dots over the directions of elongation in the plane of the sample is taken into account in terms of the two models, and the model predictions are compared with experimental observations.