In this paper, we study the exciton absorption spectra in InGaAs prolate ellipsoidal quantum dots when a strong pump laser resonant with electron quantized levels is active. Our obtained results by renormalized wavefunction theory show that, under suitable conditions, the initial exciton absorption peak is split into two new peaks as the evidence of the existence of the three-level optical Stark effect of excitons. We have suggested an explanation of the origin of the effect as well as investigating the effect of pump field energy, size, and geometric shape of the quantum dots on effect characteristics. The comparison with the results obtained in the spherical quantum dots implies the important role of geometric shape of the quantum structures when we examine this effect.
@article{arxiv.2103.00161,
title = {On the optical Stark effect of excitons in InGaAs prolate ellipsoidal quantum dots},
author = {Le Thi Ngoc Bao and Duong Dinh Phuoc and Le Thi Dieu Hien and Dinh Nhu Thao},
journal= {arXiv preprint arXiv:2103.00161},
year = {2021}
}
Comments
27pages, 12 figures,to be published in Journal of Nanomaterials