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Berlin 2015 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 55: Quantum dots: Interaction with environment

HL 55.6: Talk

Wednesday, March 18, 2015, 16:15–16:30, EW 203

Excitation of complex spin dynamics patterns in a quantum-dot electron spin ensemble — •Henning Moldenhauer1, Steffen Varwig1, Irina A. Yugova2, Alexandre René1, Tomasz Kazimierczuk1, Alex Greilich1, Dmitri R. Yakovlev1,3, Dirk Reuter4, Andreas D. Wieck4, and Manfred Bayer1,31Experimentelle Physik 2, Technische Universität Dortmund, 44221 Dortmund, Germany — 2Spin Optics Laboratory, Saint-Petersburg State University, 198504 St. Petersburg, Russia — 3Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia — 4Angewandte Festkörperphysik, Ruhr-Universität Bochum, 44780 Bochum, Germany

We investigate on special periodic pulsed laser excitation protocols in (In,Ga)As/GaAs quantum dot spin ensembles to access more complex nontrivial dynamic patterns. Using a pump-probe setup we apply an additional rectification pulse to generate higher harmonics in the observed spin precession reflecting the orientation patterns of mode-locked spins in a dephased spin ensemble.

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