Dephasing times in quantum dots due to elastic LO phonon-carrier collisions
Condensed Matter
2009-10-31 v1
Abstract
Interpretation of experiments on quantum dot (QD) lasers presents a challenge: the phonon bottleneck, which should strongly suppress relaxation and dephasing of the discrete energy states, often seems to be inoperative. We suggest and develop a theory for an intrinsic mechanism for dephasing in QD's: second-order elastic interaction between quantum dot charge carriers and LO-phonons. The calculated dephasing times are of the order of 200 fs at room temperature, consistent with experiments. The phonon bottleneck thus does not prevent significant room temperature dephasing.
Cite
@article{arxiv.cond-mat/0006394,
title = {Dephasing times in quantum dots due to elastic LO phonon-carrier collisions},
author = {A. V. Uskov and A. -P. Jauho and B. Tromborg and J. Mork and R. Lang},
journal= {arXiv preprint arXiv:cond-mat/0006394},
year = {2009}
}
Comments
4 pages, 1 figure, accepted for Phys. Rev. Lett