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Wednesday, September 3, 2014
Abstract-Terahertz radiation as a probe of the dynamics of coherently injected photocurrents in quantum well and graphene systems
We calculate the terahertz radiation that would be emitted from rotating current densities coherently injected by two-colour optical pulses in GaAs and graphene samples in a magnetic field. This is done for realistic experimental geometries and parameters, with scattering and relaxation processes taken into account phenomenologically. Results are presented in the time domain for the expected terahertz signal observed at a detector. We include predictions for bilayer graphene as well as monolayer graphene, and compare with results expected in the absence of a magnetic field.