Friday, November 14, 2014
Abstract-Nonlinear transmission of an intense terahertz field through monolayer graphene
We report terahertz (THz) effects in giving rise to transmission enhancement of a single-cycle THz pulse when the incident THz peak is increased. This transmission enhancement is attributed to reduced photoconductivity, due to saturation effects in the field-induced current and increased intraband rates arising from transient heating of electrons. We have developed a tight-binding model of the response using the length gauge interaction Hamiltonian that provides good qualitative agreement. The model fully accounts for the response arising from the linear dispersion energy spectrum in The results reveal a strong dependence of the time on the THz field, which is at the heart of the observed response.