Free-electron nanolaser based on graphene plasmons

In this paper, a possible way to achieve lasing from THz extreme UV domain due stimulated scattering of graphene plasmons on the free electrons is considered. The analytical-quantitative description proposed FEL scheme based self-consistent set Maxwell--Vlasov equations. We study downconversion as well upconversion. It shown that coherent infrared radiation one can be achieved using source very non-relativistic at resonant coupling with plasmons. Due strongly confined plasmons, upconversion mid-infrared mildly relativistic electron beams. latter promising mechanism for tabletop short-wavelength nanolaser.