Observation of Intra- and Inter-band Transitions in the Optical Response of Graphene

Details Observation of Intra- and Inter-band Transitions in the Optical Response of Graphene Observation of Intra- and Inter-band Transitions in the Optical Response of Graphene

2011-04-15

arxiv.org/abs/1104.3104v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages (4 pages manuscript + Supplemental Info.)

Scientific paper

The optical conductivity of freely suspended graphene was examined under non-equilibrium conditions using femtosecond pump-probe spectroscopy. We observed a conductivity transient that varied strongly with the electronic temperature, exhibiting a crossover from enhanced to decreased absorbance with increasing pump fluence. The response arises from a combination of bleaching of the inter-band transitions by Pauli blocking and induced absorption from the intra-band transitions of the carriers. The latter dominates at low electronic temperature, but, despite an increase in Drude scattering rate, is overwhelmed by the former at high electronic temperature. The time-evolution of the optical conductivity in all regimes can described in terms of a time-varying electronic temperature.

Affiliated with

Also associated with

No associations

Rating

Observation of Intra- and Inter-band Transitions in the Optical Response of Graphene does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Observation of Intra- and Inter-band Transitions in the Optical Response of Graphene, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observation of Intra- and Inter-band Transitions in the Optical Response of Graphene will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-9208