Wednesday, November 25, 2015
Abstract-Optical bistability induced by nonlinear surface plasmon polaritons in graphene in terahertz regime
We demonstrate in a prism-air-graphene-dielectric structure. Under a moderate in the terahertz frequency regime, the third order nonlinear optical conductivity is comparable to the linear conductivity. The nonlinear conductivity enhances the energy of Both the energy and frequency of the depend on the strength of the nonlinear current in the layer. When considering excitation in the Kretschmann configuration, the reflectance as a function of frequency exhibits bistability. The origin of the bistability is the field dependence of the plasmon mode. We have determined the parameter regime for the occurrence of bistability in this structure.