Negative Landau damping in bilayer graphene
Mesoscale and Nanoscale Physics
2017-10-04 v1
Abstract
We theoretically demonstrate that a system formed by two coupled graphene sheets enables a negative damping regime wherein graphene plasmons are pumped by a DC current. This effect is triggered by electrons drifting through one of the graphene sheets and leads to the spontaneous light emission (spasing) and wave instabilities in the mid-infrared range. It is shown that there is a deep link between the drift-induced instabilities and wave instabilities in moving media, as both result from the hybridization of oscillators with oppositely signed frequencies. With a thickness of few nanometers and wide spectral tunability, the proposed structure may find interesting applications in nanophotonic circuitry as an on-chip light source.
Cite
@article{arxiv.1703.03623,
title = {Negative Landau damping in bilayer graphene},
author = {Tiago A. Morgado and Mário G. Silveirinha},
journal= {arXiv preprint arXiv:1703.03623},
year = {2017}
}