Intense-pulse dynamics of massless Dirac electrons
Mesoscale and Nanoscale Physics
2022-05-19 v1 Quantum Physics
Abstract
We identify and describe how intense short light pulses couple to massless Dirac fermions in two-dimensional systems. The ensuing excitation dynamics exhibits unusual scaling with the wavelength of the light due the linear dispersion of the band structure and the fact that light coupling is efficient only close to the Dirac points. We exploit these features to achieve valley polarization of more than 70 % with simple pulse shapes. Quantitative results are given for pristine graphene.
Cite
@article{arxiv.2109.04249,
title = {Intense-pulse dynamics of massless Dirac electrons},
author = {Hamed Koochaki Kelardeh and Ulf Saalmann and Jan M. Rost},
journal= {arXiv preprint arXiv:2109.04249},
year = {2022}
}
Comments
5 pages, 4 figures