Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 55: Quantum dots: Interaction with environment

HL 55.6: Vortrag

Mittwoch, 18. März 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. Yakovlev^1,3, Dirk Reuter⁴, Andreas D. Wieck⁴, and Manfred Bayer^1,3 — ¹Experimentelle 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.