18 October 2006 Magnetic field sensors using magnetophotonic crystals
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Abstract
In this work, we investigated the possibility of application of magnetophotonic crystals to the optical magnetic field sensor. The structure of 1D-MPC was (Ta2O5/SiO2)5/Bi:YIG/ (Ta2O5/SiO2)5 (magnetic material as a defect layer between two Bragg reflectors) on a fused quarts substrate using RF magnetron sputtering apparatus. We used Bismuth substituted yttrium iron garnet (Bi:YIG) polycrystal film as a defect layer, because Bi:YIG is well known as the magnetic material with effective MO properties, even if it is polycrystal. Due to specially designed structure, the localized mode appeared at the wavelength of 880 nm, which is tunable by the thickness of multi layers or defect layer. At the wavelength of localized mode, Faraday rotation was shown large enhancement of 1.5°, that is fifty times larger than for single Bi:YIG polycrystal film of the same thickness.
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Ritnaro Fujikawa, Ritnaro Fujikawa, Kazuhiro Tanizaki, Kazuhiro Tanizaki, A. V. Baryshev, A. V. Baryshev, Pang-Boey Lim, Pang-Boey Lim, Kwang-Ho Shin, Kwang-Ho Shin, Hironaga Uchida, Hironaga Uchida, Mitsuteru Inoue, Mitsuteru Inoue, } "Magnetic field sensors using magnetophotonic crystals", Proc. SPIE 6369, Photonic Crystals and Photonic Crystal Fibers for Sensing Applications II, 63690G (18 October 2006); doi: 10.1117/12.685801; https://doi.org/10.1117/12.685801
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