Ultrafast Nanoscale Optoelectronics

Exploiting an on-chip laser pump/probe spectroscopy we experimentally investigate picosecond photocurrents in nanoscale circuits in the time domain including dielectric displacement currents, the transport of photogenerated charge carriers to the contacts, time-resolved photothermoelectric phenomena, and recombination lifetime limited photocurrents.

Video: Time-resolved picosecond photocurrents

Recent Highlights 

Time-resolved picosecond photocurrents in contacted carbon nanotubes

Time-resolved ultrafast photocurrents and terahertz generation in freely suspended graphene

Collaborations

Heike Riel (IBM), Anna Fontcuberta i Morral (Lausanne, Switzerland), Li Song (Nagano, Japan), Pulickel Ayajan (Rice, USA), Dieter Schuh (Regensburg, Germany), Werner Wegscheider (Zurich, Switzerland)

Recent Publications

A list of recent publications can be found here.

Funding

Funding by the following institutions is gratefully acknowledged: 

      Nanosystems Initiative Munich