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Title: Femtosecond carrier dynamics and saturable absorption in functionalized epitaxial graphene
Authors: Xiao, S.
Hoh, H.Y.
Loh, K.P. 
Keywords: Carrier dynamics
Epitaxial grapheme
Saturable absorption
Issue Date: 2012
Citation: Xiao, S., Hoh, H.Y., Loh, K.P. (2012). Femtosecond carrier dynamics and saturable absorption in functionalized epitaxial graphene. Procedia Engineering 36 : 583-588. ScholarBank@NUS Repository.
Abstract: We have measured carrier relaxation times and nonlinear optical properties in three functionalized epitaxial graphene layers grown on SiC wafers by using ultrafast optical pump-probe spectroscopy and open aperture z-scan at 780 nm. The results demonstrate that after different functionalization, the ratios of the slower relaxation in the range of 3.1-4.6 ps (related to carrier-phonon intraband and interband scattering) increase about 2-6 times compared to original graphene. These changes of relaxation obviously improved the nonlinear optical properties, making functionalized epitaxial graphene can be used as a tuneable saturable absorber. © 2012 Published by Elsevier Ltd.
Source Title: Procedia Engineering
ISSN: 18777058
DOI: 10.1016/j.proeng.2012.03.085
Appears in Collections:Staff Publications

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