The effect of quantum dot shape and position on electron confinement in dot-in-a-well structures

In this paper we present results of our study on electron confinement in dot-in-a-well (DWELL) structures. The structures under investigation consist of an InAs quantum dot (QD) confined in an InGaAs quantum well (QW), which in turn buried in GaAs bulk. We examine DWELL structures of various quantum dot shapes embedded in the same quantum well and calculate their electronic structures. We perform our simulation using path integral Monte Carlo (PIMC) method with virial energy estimator. Our simulation results reveal that electron confinement in DWELL structures strongly depends on QD shape as well as its relative location inside the well.