Four wave mixing spectroscopy of quantum dot molecules

TL;DR

This paper theoretically investigates the nonlinear four wave mixing response of quantum dot molecules, analyzing how ensemble parameters influence the FWM echo signal shape.

Contribution

It introduces a theoretical framework for understanding the FWM response of coupled quantum dot pairs, considering ensemble statistics and size correlations.

Findings

FWM echo shape depends on transition energy statistics

Size correlations between dots affect the FWM response

Theoretical insights into quantum dot molecule spectroscopy

Abstract

We study theoretically the nonlinear four wave mixing (FWM) response of an ensemble of coupled pairs of quantum dots (quantum dot molecules). We discuss the shape of the FWM echo signal depending on the parameters of the ensemble: the statistics of transition energies and the degree of size correlations between the dots forming the molecules.