103 citations · 386 across the 6 of their papers we have counts for
6 papers
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…
Observation of second-harmonic generation induced by pure spin currents
Lalani K. Werake, Hui Zhao
Extensive efforts are currently being devoted to developing a new electronic technology, called spintronics, where the spin of electrons is explored to carry information. [1,2] Sev…
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…
Hot carrier diffusion in graphene
Brian A. Ruzicka, Shuai Wang, Lalani K. Werake +3
We report an optical study of charge transport in graphene. Diffusion of hot carriers in epitaxial graphene and reduced graphene oxide samples are studied using an ultrafast pump-p…
Femtosecond Pump-Probe Studies of Reduced Graphene Oxide Thin Films
Brian A. Ruzicka, Lalani K. Werake, Hui Zhao +2
The dynamics of photocarriers in reduced graphene oxide thin films is studied by using ultrafast pump-probe spectroscopy. Time dependent differential transmissions are measured wit…
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…