Nonlinear THz Conductivity Dynamics in P‑Type CVD-Grown Graphene

Nonlinear THz Conductivity Dynamics in P‑Type CVD-Grown Graphene

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...

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Veröffentlicht in:The journal of physical chemistry. B 2013-12, Vol.117 (49), p.15819-15824
Hauptverfasser: Hwang, Harold Y, Brandt, Nathaniel C, Farhat, Hootan, Hsu, Allen L, Kong, Jing, Nelson, Keith A
Format: Artikel
Sprache:eng
Schlagworte:
Carriers
Field strength
Graphene
Nonlinearity
Physical chemistry
Pumping
Pumps
Spectra
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Zusammenfassung: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.
ISSN:1520-6106
1520-5207
DOI:10.1021/jp407548a