Below-bandgap excitation of bulk semiconductors by twisted light
Mesoscale and Nanoscale Physics
2014-12-16 v1 Optics
Abstract
I theoretically investigate the response of bulk semiconductors to excitation by twisted light below the energy bandgap. To this end, I modify a well-known model of light-semiconductor interaction to account for the conservation of the light's momentum. I show that the excited states can be thought of as a superposition of slightly perturbed exciton states undergoing a complex center-of-mass motion. In addition, the absorption would occur at a slightly shifted energy (compared to plane waves) and would exhibit complex spatial patterns in the polarization and current.
Keywords
Cite
@article{arxiv.1309.3064,
title = {Below-bandgap excitation of bulk semiconductors by twisted light},
author = {G. F. Quinteiro},
journal= {arXiv preprint arXiv:1309.3064},
year = {2014}
}