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Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 63: Poster: Quantum Dots and Optics

HL 63.24: Poster

Mittwoch, 22. März 2017, 15:00–19:00, P1A

Spin noise spectroscopy on a single InAs quantum dot — •André P. Frauendorf1, Julia Wiegand1, Dmitry S. Smirnov2, Mikhail M. Glazov2, Jens Hübner1, and Michael Oestreich11Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstraße 2, D-30167 Hannover — 2Ioffe Institute, Polytechnicheskaya 26, 194021 St. Petersburg, Russia

The spin dynamics of electrons and holes confined in InAs quantum dots (QDs) are of particular interest for future applications in solid state quantum information processing. We implement spin noise spectroscopy (SNS) in order to access the intrinsic spin dynamics of confined carriers in individualy selected single QDs [1]. Measurements on single heavy-hole spins reveal a strong magnetic field dependence of the longitudinal spin relaxation time for low magnetic fields with relaxation times up to 180 µs [2]. We show by high precision measurements a deviation from the spin dynamics which would be expected from the usual two level system. Particularly, accurate measurements in dependence of the probe laser detuning reveal the existence of an additional spin noise contribution that arises from the intriguing interaction with the solid state environment.

J. Hübner, F. Berski, R. Dahbashi, and M. Oestreich, phys. stat. sol. (b) 251, 1824 (2014).
R. Dahbashi, J. Hübner, F. Berski, K. Pierz, and M. Oestreich, Phys. Rev. Lett. 112, 156601 (2014).

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