20 Dec 2012
Laser controlled graphene electronics
Prof. Saveliev in collaboration with Prof. Peter Hänggi and Prof. Wolfgang Häusler from Augsburg University (Germany) has shown that a graphene sheet driven by time-dependent potentials (for instance, laser fields, see figure below) can be resonantly tuned from ideal electron mirror to ideal electron glass allowing filter out electrons with certain momentum. It was reported to a recently published Phys. Rev. Lett. 109, 226602 (2012), which has been featured in Augsburg University press-release.
Fig: Graphene sheet between two electrodes (shown in blue) generating an electro- static potential, which can be modulated by ac electric fields (yellow circle) generated by laser (red cylinder).