Ultrafast Terahertz (THz) Magneto-Spectroscopy (UTMS) measurements were performed on p-type CVD graphene sample to investigate the intrinsic carrier dynamics of the material. We investigated static and time-resolved THz transmission measurements, in which the sample was photo-excited by a near infrared (NIR) pump pulse, in order to study its behavior in a magnetic field. In these measurements the free carriers were probed to independently measure the carrier density and scattering rate in this film. We observed, in our graphene sample, an increase in transmission related to a negative photoconductivity (decrease in conductivity after photoexcitation) consistent with previous research. This decrease is predicted by our model and relate to the energy dependence of the scattering process considered in this paper.
Foo Kune, Rhyan
"Modelling Transient Terahertz Magneto-Spectroscopy measurements of p-type CVD Graphene leading to a negative photoconductivity.,"
Macalester Journal of Physics and Astronomy:
1, Article 5.
Available at: http://digitalcommons.macalester.edu/mjpa/vol3/iss1/5