Publication
Physical Review B - CMMP
Paper

Relaxation of optically excited carriers in graphene

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Abstract

We explore the relaxation of photoexcited graphene by solving a transient Boltzmann transport equation with electron-phonon (e-ph) and electron-electron (e-e) scattering. Simulations show that when the excited carriers are relaxed by e-ph scattering only, a population inversion can be achieved at energies determined by the photon energy. However, e-e scattering quickly thermalizes the carrier energy distributions washing out the negative optical conductivity peaks. The relaxation rates and carrier multiplication effects are presented as a function of photon energy, graphene doping, and dielectric constant. © 2011 American Physical Society.

Date

10 Aug 2011

Publication

Physical Review B - CMMP

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