256 citations · 876 across the 13 of their papers we have counts for
9 papers · 1 filter
Exciton diffusion in semiconducting single-wall carbon nanotubes studied by transient absorption microscopy
Brian A. Ruzicka, Rui Wang, Jessica Lohrman +2
Spatiotemporal dynamics of excitons in isolated semiconducting single-walled carbon nanotubes are studied using transient absorption microscopy. Differential reflection and transmi…
Ultrafast and spatially resolved studies of charge carriers in atomically-thin molybdenum disulfide
Rui Wang, Brian A. Ruzicka, Nardeep Kumar +3
Atomically-thin molybdenum disulfide is emerging as a new nanomaterial with potential applications in the fields of electronic and photonics. Charge carrier dynamics plays an essen…
Optical pump-probe studies of carrier dynamics in few-layer MoS2
Rui Wang, Brian A. Ruzicka, Nardeep Kumar +3
Femtosecond optical pump-probe technique is used to study charge carrier dynamics in few-layer MoS2 samples fabricated by mechanical exfoliation. An ultrafast pump pulse excites ca…
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…
Two-probe study of hot carriers in reduced graphene oxide
Brian A. Ruzicka, Nardeep Kumar, Shuai Wang +2
The energy relaxation of carriers in reduced graphene oxide thin films is studied using optical pump-probe spectroscopy with two probes of different colors. We measure the time dif…