Optical study of three-dimensional magnetic photonic crystals opal/Fe3O4 |
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| Authors: | V.V. Pavlov P.A. Usachev D.A. Kurdyukov A.V. Kimel Th. Rasing |
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| Affiliation: | a A. F. Ioffe Physico-Technical Institute of the Russian Academy of Sciences, 194021 St. Petersburg, Russia
b Institute for Molecules and Materials, RUN, 6525 ED Nijmegen, The Netherlands |
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| Abstract: | Optical and magneto-optical properties of three-dimensional magnetic photonic crystals, based on magnetite Fe3O4 embedded into an opal film matrix, are investigated in both transmission and reflection. A strong enhancement of the polar Kerr effect and a modification of the Faraday effect have been found near the photonic band-gap of about 1.8 eV. Unusual changes of hysteresis curves and their dependence on photon energy have been revealed in the spectral region where the magneto-optical effect reverses its sign. This phenomenon has been explained by two types of magnetite particles inside the opal matrix having different coercive fields and spectral behaviour. |
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| Keywords: | 42.70.Qs 78.66.Sq 75.60.Ej |
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