Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 39: Posters II (Topological insulators; Graphene; Spintronics and spin physics; Quantum information science)

HL 39.29: Poster

Dienstag, 17. März 2015, 14:00–20:00, Poster F

All-optically induced EPR in Mn-doped quantum wells — •Markus Kuhnert, Ilya Akimov, Dimitri Yakovlev, and Manfred Bayer — TU Dortmund

The field of spintronics, which in contrast to electronics, uses the spin instead of charge as information carrier, presents many interesting possibilities. For proper implementation of spintronic devices, research of adequate materials and methods is required. Here we present the results of our research into Manganese doped GaAs quantum wells, which might offer long lived spin coherence as well as spin manipulation mediated by the magnetic Manganese ions.

Following initial studies of electron lifetime in Manganese-doped GaAs quantum wells via time resolved Kerr effect and time resolved Photoluminescence measurements, further investigation into such samples is done by Electron paramagnetic resonance measurements. In this case, a method of all optical Electron paramagnetic resonance was developed. This is achieved by intensity modulation of the incident laser beam by a frequency of about 9.2 GHz and applying varying external magnetic fields.