256 citations · 876 across the 13 of their papers we have counts for
13 papers
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…
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…
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…