256 citations · 876 across the 13 of their papers we have counts for
4 papers · 1 filter
Spatially resolved pump-probe study of single-layer graphene produced by chemical vapor deposition
Brian A. Ruzicka, Shui Wang, Jianwei Liu +3
Carrier dynamics in single-layer graphene grown by chemical vapor deposition (CVD) is studied using spatially and temporally resolved pump-probe spectroscopy by measuring both diff…
Second-harmonic generation induced by electric currents in GaAs
Brian A. Ruzicka, Lalani K. Werake, Guowei Xu +4
We demonstrate a new, nonlinear optical effect of electric currents. First, a steady current is generated by applying a voltage on a doped GaAs crystal. We demonstrate that this cu…
Ambipolar diffusion of photo-excited carriers in bulk GaAs
Brian A. Ruzicka, Lalani K. Werake, Hassana Samassekou +1
The ambipolar carrier diffusion in bulk GaAs is studied by using an ultrafast pump-probe technique with a high spatial resolution. Carriers with a point-like spatial profile are ex…
Power dependence of pure spin current injection by quantum interference
Brian A. Ruzicka, Hui Zhao
We investigate the power dependence of pure spin current injection in GaAs bulk and quantum-well samples by a quantum interference and control technique. Spin separation is measure…