Femtosecond carrier dynamics and saturable absorption in graphene suspensions

Kumar, Sunil; Anija, M; Kamaraju, N; Vasu, K S; Subrahmanyam, K S; Sood, A K; Rao, C N R

dc.contributor.author	Kumar, Sunil
dc.contributor.author	Anija, M
dc.contributor.author	Kamaraju, N
dc.contributor.author	Vasu, K S
dc.contributor.author	Subrahmanyam, K S
dc.contributor.author	Sood, A K
dc.contributor.author	Rao, C N R
dc.date.accessioned	2012-02-06T10:00:07Z
dc.date.available	2012-02-06T10:00:07Z
dc.date.issued	2009-11-09
dc.identifier	0003-6951	en_US
dc.identifier.citation	Applied Physics Letters 95(19), 191911(1-3) (2009)	en_US
dc.identifier.uri	https://libjncir.jncasr.ac.in/xmlui/10572/294
dc.description.abstract	Nonlinear optical properties and carrier relaxation dynamics in graphene, suspended in three different solvents, are investigated using femtosecond (80 fs pulses) Z-scan and degenerate pump-probe spectroscopy at 790 nm. The results demonstrate saturable absorption property of graphene with a nonlinear absorption coefficient, beta of (similar to 2-9) x 10(-8) cm/W. Two distinct time scales associated with the relaxation of photoexcited carriers, a fast one in the range of 130-330 fs (related to carrier-carrier scattering) followed by it slower one in 3.5-4.9 ps range (associated with carrier-phonon scattering) are observed. (C) 2009 American Institute of Physics. [doi:10.1063/1.3264964]	en_US
dc.description.sponsorship	Department of Science and Technology, India. University Grants Commission, India.	en_US
dc.description.uri	http://dx.doi.org/10.1063/1.3264964	en_US
dc.language.iso	en	en_US
dc.publisher	American Institute of Physics	en_US
dc.rights	© 2009 American Institute of Physics	en_US
dc.subject	Graphite	en_US
dc.subject	Films	en_US
dc.title	Femtosecond carrier dynamics and saturable absorption in graphene suspensions	en_US
dc.type	Article	en_US