Regensburg 2007 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 13: Poster 1

HL 13.34: Poster

Montag, 26. März 2007, 15:00–17:30, Poster A

Semiconductor quantum rings as a source for ultrafast magnetic and chiral light pulses — •Moskalenko A.S.¹, Matos-Abiague A.², and Berakdar J.¹ — ¹Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany — ²Institute for Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany

We investigate temporal behavior of non-equilibrium electron states in semiconductor quantum rings driven by (sub)picosecond half-cycle electromagnetic pulses and pulse sequences. These states carry time-dependent charge polarization and current [1,2]. We demonstrate how they can be used for generation of ultrafast magnetic [3] and chiral light pulses and sequences of such pulses.

[1] A. Matos-Abiague and J. Berakdar, Phys. Rev. B 70, 195338 (2004).

[2] A. Matos-Abiague and J. Berakdar, Phys. Rev. Lett. 94, 166801 (2005).

[3] A.S. Moskalenko, A. Matos-Abiague, and J. Berakdar, Phys. Rev. B 74, 161303 (2006).