Nonlinear THz conductivity dynamics in P-Type CVD-grown graphene

Harold Y. Hwang; Nathaniel C. Brandt; Hootan Farhat; Allen L. Hsu; Jing Kong; Keith A. Nelson

doi:10.1021/jp407548a

Nonlinear THz conductivity dynamics in P-Type CVD-grown graphene

Harold Y. Hwang, Nathaniel C. Brandt, Hootan Farhat, Allen L. Hsu, Jing Kong, Keith A. Nelson

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Abstract

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.

Original language	English (US)
Pages (from-to)	15819-15824
Number of pages	6
Journal	Journal of Physical Chemistry B
Volume	117
Issue number	49
DOIs	https://doi.org/10.1021/jp407548a
State	Published - Dec 12 2013
Externally published	Yes

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AU - Hwang, Harold Y.

AU - Brandt, Nathaniel C.

AU - Farhat, Hootan

AU - Hsu, Allen L.

AU - Kong, Jing

AU - Nelson, Keith A.

PY - 2013/12/12

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AB - 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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Nonlinear THz conductivity dynamics in P-Type CVD-grown graphene

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