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Spin-induced optical second harmonic generation in the centrosymmetric magnetic semiconductors EuTe and EuSe

B. Kaminski·M. Lafrentz·R. V. Pisarev·D. R. Yakovlev·V. V. Pavlov·V. A. Lukoshkin·A. B. Henriques·G. Springholz·G. Bauer·E. Abramof·P. H. O. Rappl·M. Bayer
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Abstract

Spectroscopy of the centrosymmetric magnetic semiconductors EuTe and EuSe reveals spin-induced optical second harmonic generation (SHG) in the band gap vicinity at 2.1-2.4eV. The magnetic field and temperature dependence demonstrates that the SHG arises from the bulk of the materials due to a novel type of nonlinear optical susceptibility caused by the magnetic dipole contribution combined with spontaneous or induced magnetization. This spin-induced susceptibility opens access to a wide class of centrosymmetric systems by harmonics generation spectroscopy.

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B. Kaminski, M. Lafrentz, R. V. Pisarev, D. R. Yakovlev, V. V. Pavlov, V. A. Lukoshkin, A. B. Henriques, G. Springholz, G. Bauer, E. Abramof, P. H. O. Rappl, M. Bayer. 2009-06-04. Spin-induced optical second harmonic generation in the centrosymmetric magnetic semiconductors EuTe and EuSe. https://doi.org/10.1103/physrevb.81.155201

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