Why a magnetized quantum wire can act as an active laser medium
Mesoscale and Nanoscale Physics
2015-05-20 v3
Abstract
The fundamental issues associated with the magnetoplasmon excitations are investigated in a quantum wire characterized by a confining harmonic potential and subjected to a perpendicular magnetic field. We embark on the charge-density excitations in a two-subband model within the framework of Bohm-Pines' random-phase approximation. Essentially, the focus of our study is the intersubband (magnetoroton) collective excitation which changes the sign of its group velocity twice before merging with the respective single-particle continuum. The computation of the gain coefficient suggests an interesting and important application: the electronic device based on such magnetoroton modes can act as an {\it active} laser medium.
Cite
@article{arxiv.1012.5422,
title = {Why a magnetized quantum wire can act as an active laser medium},
author = {Manvir S Kushwaha},
journal= {arXiv preprint arXiv:1012.5422},
year = {2015}
}