Berlin 2018 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 13: Poster Session I

HL 13.70: Poster

Montag, 12. März 2018, 17:30–19:30, Poster B

Exciton-assisted transversal magneto-optical Kerr effect in CdMnTe/CdMgTe quantum well structures — •Lars Klompmaker¹, Felix Spitzer¹, Olga Borovkova², Vladimir I. Belotelov^2,4, Ilya A. Akimov^1,3, Alexander N. Poddubny^3,6, Victor F. Sapega³, Maciej Wiater⁵, Tomasz Wojtowicz⁵, Grzegorz Karczewski⁵, Dmitri Yakovlev^1,3, and Manfred Bayer^1,3 — ¹Experimentelle Physik 2, TU Dortmund University, D-44221 Dortmund, Germany — ²Russian Quantum Center, Skolkovo, Russia — ³Ioffe Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia — ⁴M.V. Lomonosov Moscow State University, Moscow, Russia — ⁵Institute of Physics, Polish Academy of Sciences, PL-02668 Warsaw, Poland — ⁶ITMO University, 197101 St. Petersburg, Russia

We studied the influence of excitons in a CdMnTe/CdMgTe quantum well (QW) structure on the transverse magneto-optic Kerr effect (TMOKE) using a Fourier imaging setup, which allows the measurement of the reflected light’s intensity as a function of its energy and angular distribution at the same time. Induced by the giant Zeeman splitting of excitons in diluted magnetic semiconductors, we see a two-order enhancement of the TMOKE in the spectral region of the excitonic resonances. We are able to separate between contributions from heavy and light hole exciton states in the TMOKE’s spectral dependence with up to 2% effect at an incidence angle of about 20^∘.