Dephasing in quantum dot molecules via exciton-acoustic phonon coupling
Mesoscale and Nanoscale Physics
2007-05-23 v1 Materials Science
Abstract
We develop a theory of the linear optical spectrum of excitons in quantum dot molecules, including the effect of exciton-phonon coupling beyond the Markov limit. The model reproduces the general trend of the zero-phonon line broadening as a function of interdot distance, that were recently measured. The unexpectedly broad linewidths and their large variation are explained in terms of both the non-Markov nature of the coupling and of the matching of the phonon wavelength to the interdot distance.
Keywords
Cite
@article{arxiv.cond-mat/0504372,
title = {Dephasing in quantum dot molecules via exciton-acoustic phonon coupling},
author = {Gaetano Parascandolo and Vincenzo Savona},
journal= {arXiv preprint arXiv:cond-mat/0504372},
year = {2007}
}