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|Title:||Femtosecond carrier dynamics and saturable absorption in functionalized epitaxial graphene|
|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. https://doi.org/10.1016/j.proeng.2012.03.085|
|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|
|Appears in Collections:||Staff Publications|
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