Abstract
We demonstrate that single layer graphene exhibits a strong nonlinear photon-mixing effect in the terahertz frequency regime. Up to room temperature, the third-order nonlinear current in graphene grows rapidly with increasing temperature. The third-order nonlinear current can be as strong as the linear current under a moderate electric field strength of . Because of the unique Dirac behavior of the graphene quasi-particles, low Fermi level and electron fillings optimizes the optical nonlinearity. Under a strong-field condition, the strong-field-induced Dirac fermion population redistribution and nonequilibrium carrier heating effects further amplify the optical nonlinearity of graphene. Our results suggest that doped graphene can potentially be utilized as a strong terahertz photon mixer in the room-temperature regime.
©2012 Optical Society of America
Full Article | PDF ArticleMore Like This
Tianning Zhang, K. J. A. Ooi, Wenchao Chen, L. K. Ang, and Yee Sin Ang
Opt. Express 27(26) 38270-38280 (2019)
T. Stroucken, J. H. Grönqvist, and S. W. Koch
J. Opt. Soc. Am. B 29(2) A86-A94 (2012)
Sunchao Huang, My Hanh Tran, Jack Zuber, Qian Wang, Yiming Zhu, and Chao Zhang
J. Opt. Soc. Am. B 36(2) 200-203 (2019)