Terahertz induced transparency in single-layer graphene

Michael J. Paul, Byounghwak Lee, Jenna L. Wardini, Zachary J. Thompson, Andrew D. Stickel, Ali Mousavian, Hyunyong Choi, Ethan D. Minot, Yun-Shik Lee
2014 Applied Physics Letters  
We show that the transmission of a terahertz (THz) pulse through single-layer graphene is strongly nonlinear. As the peak electric field of the THz pulse exceeds 50 kV/cm, the graphene becomes increasingly transparent to the THz radiation. When field strength reaches 800 kV/cm, the increased transparency corresponds to a two-fold decrease in the time-average sheet conductivity of the graphene (time averaged over the duration of the pulse). Time-resolved measurements reveal that the leading
more » ... on of the pulse creates transparency for the trailing portion, with a 10-fold suppression in sheet conductivity at the tail of the strongest THz pulse. Comparing the THz-induced transparency phenomena in different sample geometries shows that substrate-free graphene is the best geometry for maximizing the nonlinear transparency effect. V C 2014 AIP Publishing LLC.
doi:10.1063/1.4902999 fatcat:vgqkvoly5zcujiqar3f6tv5k5m