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 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.
Experimentelle Physik 2, Technische Universität Dortmund, D-44221 Dortmund, Germany.
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B
Kaminski
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Lafrentz
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Pisarev
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Yakovlev
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Pavlov
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Lukoshkin
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Henriques
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Springholz
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Bauer
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Abramof
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Rappl
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Bayer