174 citations · 195 across the 4 of their papers we have counts for
4 papers
Towards femtosecond on-chip electronics
Christopher Karnetzky, Philipp Zimmermann, Christopher Trummer +4
To combine the advantages of ultrafast femtosecond optics with an on-chip communcation scheme, optical signals with a frequency of several hundreds of THz need to be down-converted…
Ballistic and resonant negative photocurrents in semiconducting carbon nanotubes
Christoph Karnetzky, Lukas Sponfeldner, Max Engl +1
Ultrafast photocurrent experiments are performed on semiconducting, single-walled carbon nanotubes under a resonant optical excitation of their subbands. The photogenerated exciton…
Ultrafast helicity control of surface currents in topological insulators with near-unity fidelity
Christoph Kastl, Christoph Karnetzky, Helmut Karl +1
In recent years, a class of solid state materials, called three-dimensional topological insulators, has emerged. In the bulk, a topological insulator behaves like an ordinary insul…
Polarization dependent, surface plasmon induced photoconductance in gold nanorod arrays
S. Diefenbach, N. Erhard, J. Schopka +4
We report on the photoconductance in two-dimensional arrays of gold nanorods which is strongly enhanced at the frequency of the longitudinal surface plasmon of the nanorods. The ar…