136 citations · 291 across the 4 of their papers we have counts for
4 papers
Spatially resolved femtosecond pump-probe study of topological insulator Bi2Se3
Nardeep Kumar, Brian A. Ruzicka, N. P. Butch +4
Carrier and phonon dynamics in Bi2Se3 crystals are studied by a spatially resolved ultrafast pump-probe technique. Pronounced oscillations in differential reflection are observed w…
Observation of intrinsic inverse spin Hall effect
Lalani K. Werake, Brian A. Ruzicka, Hui Zhao
We report observation of intrinsic inverse spin Hall effect in un-doped GaAs multiple quantum wells with a sample temperature of 10 K. A transient ballistic pure spin current is in…
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…
All-optical generation and detection of sub-picosecond ac spin current pulses in GaAs
Brian A. Ruzicka, Karl Higley, Lalani K. Werake +1
Sub-picosecond ac spin current pulses are generated optically in GaAs bulk and quantum wells at room temperature and 90K through quantum interference between one-photon and two-pho…