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Spotlight on Optics

Spotlight on Optics


  • February 2010

Optics InfoBase > Spotlight on Optics > The Physics of ultrafast saturable absorption in graphene

The Physics of ultrafast saturable absorption in graphene

Published in Optics Express, Vol. 18 Issue 5, pp.4564-4573 (2010)
by Guichuan Xing, Hongchen Guo, Xinhai Zhang, Tze Chien Sum, and Cheng Hon Alfred Huan

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Spotlight summary: The study of the nonlinear optical properties of graphene has received a lot of attention recently, given its potential applications in photonic devices, including mode-lockers, optical switches, and optical limiters. However, to date most of the studies on this topic have largely been experimental. Therefore, the significant theoretical component of this well-written article is a significant highlight. The authors provide both a theoretical model and an experimental characterization of the ultrafast saturable absorption in graphene, grown epitaxially on a transparent, wide-bandgap semiconductor SiC substrate. It is shown that graphene possesses excellent saturable absorption properties with low saturation intensity, controllable saturation depth, ultrafast recovery time, near symmetric spatio-temporal narrowing, and high damage threshold.

Technical Division: Light–Matter Interactions
ToC Category: Materials
OCIS Codes: (190.4400) Nonlinear optics : Nonlinear optics, materials
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
(160.4236) Materials : Nanomaterials

Posted on February 24, 2010

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