Dresden 2011 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 38: Poster Session Transport

TT 38.35: Poster

Mittwoch, 16. März 2011, 14:00–18:00, P3

Four-wave mixing to detect wave-packet revivals on graphene — •Viktor Krueckl, Tobias Kramer, and Klaus Richter — Institut für Theoretische Physik, Universität Regensburg, 93040 Regensburg, Germany

By applying a perpendicular magnetic field the quasi-relativistic electrons of graphene are quantized into non-equidistantly spaced Landau levels. Consequently the time-evolution of an excited wave-packet undergoes collapses and revivals similar to the dynamics of highly excited Rydberg states [1]. We investigate the detection of graphene revivals by means of four-wave mixing. A few cycle laser pulse is used to generate an excited state, which is probed by a second time-delayed pulse. We apply a non-pertubative wave-packet scheme which allows for the calculation of the complete angle resolved polarization. The resulting integrated signals show a clear correspondence between the time-delay of the probe pulse and the wave-packet revival time.

[1] Viktor Krueckl and Tobias Kramer, New J. Phys. 11 093010 (2009)