Dresden 2009 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 50: Ultra fast phenomena

HL 50.7: Talk

Friday, March 27, 2009, 12:00–12:15, BEY 118

High-harmonic generation by a driven mesoscopic ring with a localized impurity — Nicki Hinsche, •Andrey Moskalenko, and Jamal Berakdar — Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Germany

We investigate theoretically a single-channel semiconductor mesoscopic ring with a localized impurity subjected to half-cycle electromagnetic pulses. We show that the presence of an impurity strongly influences the induced time-dependent charge polarization and for strong excitations leads to the generation of higher harmonics in the terahertz range of the emitted light spectrum.