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

Spectroscopy of the centrosymmetric magnetic semiconductors EuTe and EuSe reveals spin-induced optical second harmonic generation (SHG) in the band gap vicinity at 2.1-2.4 eV. The magnetic field and temperature dependence demonstrates that the SHG arises from the bulk of the materials due to a novel...

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Published inPhysical review letters Vol. 103; no. 5; p. 057203
Main Authors Kaminski, B, Lafrentz, M, Pisarev, R V, Yakovlev, D R, Pavlov, V V, Lukoshkin, V A, Henriques, A B, Springholz, G, Bauer, G, Abramof, E, Rappl, P H O, Bayer, M
Format Journal Article
LanguageEnglish
Published United States 31.07.2009
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Summary:Spectroscopy of the centrosymmetric magnetic semiconductors EuTe and EuSe reveals spin-induced optical second harmonic generation (SHG) in the band gap vicinity at 2.1-2.4 eV. 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.
ISSN:0031-9007
DOI:10.1103/physrevlett.103.057203