Magneto-Optic Coupling Theory for Guided Optical Waves and Magnetostatic Waves Using an Arbitrarily Tilted Bias Magnetic Field  

作　　者：武保剑 邱昆 

机构地区：[1]School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 610054

出　　处：《Chinese Physics Letters》2005年第9期2396-2399,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 60401007.

摘　　要：We report the magneto-optic （MO） coupling interaction of guided optical waves （GOWs） with magnetostatic waves （MSWs） in MO film waveguides using arbitrarily tilted bias magnetic fields. The universal MO coupledmode equations are obtained and can be applied to the collinear or noncollinear interactions of the GOWs with magnetostatic forward volume wave （MSFVW）, magnetostatic backward volume wave （MSBVW） and magnetostatic surface wave （MSSW）. As a typical example, the noncollinear diffraction interaction of the GOW with the MSFVW excited by single-element microstrip line transducer in the yttrium-iron-garnet （YIG） film is analysed in detail. For the case of normal magnetization, the calculated plot is consistent with the experimental results in the first passband. By comparison, the diffraction efficiency （DE） can further be improved by optimizing the magnetization direction. The maximum DE gain can reach 5. 7 dB under the appropriately inclined bias magnetic field at φ = 180° and θ = 9°.We report the magneto-optic （MO） coupling interaction of guided optical waves （GOWs） with magnetostatic waves （MSWs） in MO film waveguides using arbitrarily tilted bias magnetic fields. The universal MO coupledmode equations are obtained and can be applied to the collinear or noncollinear interactions of the GOWs with magnetostatic forward volume wave （MSFVW）, magnetostatic backward volume wave （MSBVW） and magnetostatic surface wave （MSSW）. As a typical example, the noncollinear diffraction interaction of the GOW with the MSFVW excited by single-element microstrip line transducer in the yttrium-iron-garnet （YIG） film is analysed in detail. For the case of normal magnetization, the calculated plot is consistent with the experimental results in the first passband. By comparison, the diffraction efficiency （DE） can further be improved by optimizing the magnetization direction. The maximum DE gain can reach 5. 7 dB under the appropriately inclined bias magnetic field at φ = 180° and θ = 9°.

关 键 词：VOLUME WAVES BRAGG-DIFFRACTION 

分 类 号：TM331[电气工程—电机]