Feasibility of terahertz lasing in optically pumped epitaxial multiple graphene layer structures

Details Feasibility of terahertz lasing in optically pumped epitaxial multiple graphene layer structures Feasibility of terahertz lasing in optically pumped epitaxial multiple graphene layer structures

2009-08-18

arxiv.org/abs/0908.2488v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 7 figures

Scientific paper

A multiple-graphene-layer (MGL) structure with a stack of GLs and a highly conducting bottom GL on SiC substrate pumped by optical radiation is considered as an active region of terahertz (THz) and far infrared (FIR) lasers with external metal mirrors. The dynamic conductivity of the MGL structure is calculated as a function of the signal frequency, the number of GLs, and the optical pumping intensity. The utilization of optically pumped MGL structures might provide the achievement of lasing with the frequencies of about 1 THz at room temperature due to a high efficiency.

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