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|Title:||Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films||Authors:||Shang, J.
|Issue Date:||18-Oct-2010||Citation:||Shang, J., Luo, Z., Cong, C., Lin, J., Yu, T., Gurzadyan, G.G. (2010-10-18). Femtosecond UV-pump/visible-probe measurements of carrier dynamics in stacked graphene films. Applied Physics Letters 97 (16) : -. ScholarBank@NUS Repository. https://doi.org/10.1063/1.3504704||Abstract:||The transient differential transmission (ΔT/T) spectra of graphene were obtained from 380 (3.3 eV) to 670 nm (1.9 eV). The intraband carrier equilibration by carrier-carrier scattering occurred within 60 fs. The subsequent carrier relaxation process was governed by carrier-optical phonon scattering and had linear dependence on the probe photon energy (Epr); lifetimes ranged from 180 to 90 fs for Epr from 2.1 to 2.8 eV. Negative ΔT/T signals in kinetic curves were discussed and assigned to thermal diffusion and shrinkage of band separation caused by lattice heating. © 2010 American Institute of Physics.||Source Title:||Applied Physics Letters||URI:||http://scholarbank.nus.edu.sg/handle/10635/96616||ISSN:||00036951||DOI:||10.1063/1.3504704|
|Appears in Collections:||Staff Publications|
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