The physics of ultrafast saturable absorption in graphene

Guichuan Xing; Hongchen Guo; Xinhai Zhang; Tze Chien Sum; Cheng Hon Alfred Huan

doi:10.1364/OE.18.004564

The physics of ultrafast saturable absorption in graphene

Guichuan Xing^*, Hongchen Guo, Xinhai Zhang, Tze Chien Sum, Cheng Hon Alfred Huan

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

338 Citations (Scopus)

Abstract

The ultrafast saturable absorption in graphene is experimentally and theoretically investigated in the femtosecond (fs) time regime. This phenomenon is well-modeled with valence band depletion, conduction band filling and ultrafast intraband carrier thermalization. The latter is dominated by intraband carrier-carrier scattering with a scattering time of 8 (± 3) fs, which is far beyond the time resolution of other ultrafast techniques with hundred fs laser pulses. Our results strongly suggest that graphene is an excellent atomic layer saturable absorber.

Original language	English
Pages (from-to)	4564-4573
Number of pages	10
Journal	Optics Express
Volume	18
Issue number	5
DOIs	https://doi.org/10.1364/OE.18.004564
Publication status	Published - Mar 1 2010
Externally published	Yes

ASJC Scopus Subject Areas

Atomic and Molecular Physics, and Optics

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AU - Xing, Guichuan

AU - Guo, Hongchen

AU - Zhang, Xinhai

AU - Sum, Tze Chien

AU - Huan, Cheng Hon Alfred

PY - 2010/3/1

Y1 - 2010/3/1

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AB - The ultrafast saturable absorption in graphene is experimentally and theoretically investigated in the femtosecond (fs) time regime. This phenomenon is well-modeled with valence band depletion, conduction band filling and ultrafast intraband carrier thermalization. The latter is dominated by intraband carrier-carrier scattering with a scattering time of 8 (± 3) fs, which is far beyond the time resolution of other ultrafast techniques with hundred fs laser pulses. Our results strongly suggest that graphene is an excellent atomic layer saturable absorber.

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The physics of ultrafast saturable absorption in graphene

Abstract

ASJC Scopus Subject Areas

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