Regensburg 2013 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 29: Poster Session: Spintronics; Spin-controled transport; Topological insulators; Interfaces / Surfaces; Magnetic semiconductors

HL 29.13: Poster

Montag, 11. März 2013, 16:00–20:00, Poster A

Spin manipulation in spin light-emitting diodes: electron spin resonance in the ZnMnSe spin aligner — •Franziska Reiter, Andreas Merz, Robert Schittny, Benjamin Wolter, Daniel Rülke, Heinz Kalt, and Michael Hetterich — KIT, Karlsruhe, Germany

We investigate the possibility to perform electron spin resonance experiments within a spin-injection light-emitting diode. The latter contains a ZnMnSe spin aligner for spin injection into single optically active InGaAs quantum dots with a spin polarization degree of up to 100% [1]. For the manipulation experiments, a specially prepared spin light-emitting diode is placed in a microwave cavity and is exposed to microwave pulses with different powers and frequencies. At 53 GHz we observe the resonance of the manganese ions in the ZnMnSe spin aligner at 2 T via optically detected magnetic resonance in the photo luminescence signal. Furthermore, this influence is optimized towards coherent manipulation of spin states and spin injection into single quantum dots. This method could pave the way towards future spin manipulation experiments in such semiconductor structures.

[1] W. Löffler et al., Appl. Phys. Lett. 90, 232105 (2007).