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arxiv: 1101.4985 · v1 · pith:DOI7DEE5new · submitted 2011-01-26 · ❄️ cond-mat.mtrl-sci

Nonlinear THz Conductivity Dynamics in CVD-Grown Graphene

Harold Y. Hwang , Nathaniel C. Brandt , Hootan Farhat , Allen L. Hsu , Jing Kong , Keith A. Nelson This is my paper
classification ❄️ cond-mat.mtrl-sci
keywords grapheneconductivitycvd-grownnonlinearstrongtransparencyabsorptionarise
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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.

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  1. Engineering THz-frequency light generation, detection and manipulation through graphene

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    Graphene's high conductivity, fast carrier dynamics, and tunability enable engineering of THz-frequency photodetectors, modulators, and sources.