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arXiv · 2107.07265

Birefringence-mediated enhancement of the magneto-optical activity in anisotropic magnetic crystals

D. O. Ignatyeva·A. A. Voronov·P. V. Shilina·P. O. Kapralov·S. V. Yagupov·Y. A. Mogilenec·M. B. Strugatsky·V. I. Belotelov
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Abstract

Optical anisotropy is usually treated as an unfavorable condition for the magneto-optical measurements since it is known to diminish the Faraday rotation concerning the case of the isotropic medium. Here we show that the situation could be quite opposite: a phenomenon of birefringence mediated enhancement of the magneto-optical activity appears if the incident light polarization and angle of incidence are set properly. The present study relies on the experimental, analytical, and numerical studies of iron borate $\mathrm{FeBO_3}$ crystals. We demonstrate a significant increase of the magneto-optical activity resulting in nearly $100\%$ magneto-optical light modulation magnitude. The approach applies to other types of birefringent crystals with the magneto-optical response that makes it crucial for various practical applications, including magneto-optical microscopy, pump-probe studies, and others.

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D. O. Ignatyeva, A. A. Voronov, P. V. Shilina, P. O. Kapralov, S. V. Yagupov, Y. A. Mogilenec, M. B. Strugatsky, V. I. Belotelov. 2021-07-15. Birefringence-mediated enhancement of the magneto-optical activity in anisotropic magnetic crystals. https://arxiv.org/abs/2107.07265

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