Berlin 2015 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 96: Poster III C (III-V Semiconductors incl. Nitrides)

HL 96.3: Poster

Donnerstag, 19. März 2015, 14:00–20:00, Poster B

Rabi Oscillations of Photon Echo in (In,Ga)As Quantum Dots — •Matthias Salewski¹, Lukas Langer¹, Sergey V. Poltavtsev^1,2, Irina A. Yugova^1,2, Dimitri R. Yakovlev^1,3, Christian Schneider⁴, Martin Kamp⁴, Ilya A. Akimov^1,3, and Manfred Bayer^1,3 — ¹Experimentelle Physik 2, Technische Universität Dortmund, 44221 Dortmund, Germany — ²Spin Optics Laboratory, St. Petersburg State University, 198504 St. Petersburg, Russia — ³A.F. Ioffe Physical-Technical Institute, 194021 St. Petersburg, Russia — ⁴Technische Physik, Universität Würzburg, 97074 Würzburg, Germany

We perform four-wave-mixing spectroscopy on an ensemble of inhomogeneously broadened (In,Ga)As quantum dots which are embedded into a cavity with low quality factor Q∼200. Enhancement of light-matter interaction in studied structures allows us to observe strong photon echo (PE) signals.

In our experiments we studied the dependence of the PE amplitude on the pulse area of ps-laser pulses for different polarization configurations. The oscillatory behavior of the PE amplitude as function of the first and second pulse areas is attributed to Rabi oscillations. We observe different envelopes for oscillations in various polarization configurations which is explained due to different contributions of exciton and trion sub-ensembles.