Terahertz lasers based on optically pumped multiple graphene structures with slot-line and dielectric waveguides

摘要

Terahertz (THz) lasers on optically pumped multiple-graphene-layer (MGL)structures as their active region are proposed and evaluated. The developeddevice model accounts for the interband and intraband transitions in thedegenerate electron-hole plasma generated by optical radiation in the MGLstructure and the losses in the slot or dielectric waveguide. The THz lasergain and the conditions of THz lasing are found. It is shown that the lasersunder consideration can operate at frequencies > 1 THz at room temperatures.