In this paper, a possible way to achieve lasing from THz to extreme UV domain due to stimulated scattering of graphene plasmons on the free electrons is considered. The analytical-quantitative description of the proposed FEL scheme is based on the self-consistent set of the Maxwell--Vlasov equations. We study the downconversion as well as the upconversion. It is shown that the coherent downconversion of infrared radiation to THz one can be achieved using a source of very non-relativistic electrons at the resonant coupling with the graphene plasmons. Due to the strongly confined graphene plasmons, the upconversion of mid-infrared to extreme UV radiation can be achieved with the mildly relativistic electron beams. The latter is a promising mechanism for the tabletop short-wavelength free electron nanolaser.
@article{arxiv.2012.11376,
title = {Free electron nanolaser based on the graphene plasmons},
author = {H. K. Avetissian and B. R. Avchyan and G. F. Mkrtchian and H. H. Matevosyan},
journal= {arXiv preprint arXiv:2012.11376},
year = {2021}
}