Regensburg 2019 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 32: Spintronics

HL 32.9: Vortrag

Mittwoch, 3. April 2019, 17:15–17:30, H33

Spin noise spectroscopy of resident carriers in InGaAs/GaAs self-assembled QD in DBR — •Aleksandr Kamenskii, Alex Greilich, and Manfred Bayer — Experimentelle Physik 2, Technische Universität Dortmund, 44221 Dortmund, Germany

Spin noise spectroscopy is a developing method, that allows measurement of spin relaxation times by measurements of correlations of stochastic spin fluctuations with low perturbation. We apply this method to study the spin noise signal formation in n-doped quantum dots placed in DBR microcavity and use homodyne detection scheme to enhance the detection sensitivity. Due to DBR structure, the light-matter interaction becomes enhanced, and the Faraday rotation noise increases by Q-factor of DBR. In this way, the study of fine effects becomes available. We demonstrate and proof that spin noise information is carried by scattered light, as Gorbovitskii-Perel theorem predicts.