We report strong THz-induced transparency in CVD-grown graphene where 92%-96% of the peak-field is transmitted compared to 74% at lower field strength. Time-resolved THz-pump/THz-probe studies reveal that the absorption recovers in 2-3 ps. The induced transparency is believed to arise from nonlinear pumping of carriers in graphene which suppresses the mobility and consequently the conductivity in a spectral region where the light-matter interaction is particularly strong.
Cite
@article{arxiv.1101.4985,
title = {Nonlinear THz Conductivity Dynamics in CVD-Grown Graphene},
author = {Harold Y. Hwang and Nathaniel C. Brandt and Hootan Farhat and Allen L. Hsu and Jing Kong and Keith A. Nelson},
journal= {arXiv preprint arXiv:1101.4985},
year = {2015}
}