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Research was conducted to examine the noncollinear interaction between guided optical waves and magnetostatic forward volume waves in the Bi-doped yttrium-iron-garnet waveguide. Another objective is to determine the magneto-optical coupling equations for the case that involves a TM(sub 0)-mode incident light. Results reveal that the diffraction efficiency and the mode-conversion efficiency are different in physical conception.

The noncollinear interactions between the guided optical wave (GOW) and magnetostatic backward volume wave (MSBVW) in a double-layered magnetic film structure are investigated theoretically. The explicit expressions for the rf magnetization of the MSBVW and the mode conversion efficiency (MCE) of GOW were presented in terms of various geometrical parameters and the rf input power in the case that the insertion loss of the MSBVW is taken into consideration. The effects of the thicknesses of two magnetic layers and a separation layer on the MCE of GOW and magneto-optic (MO) coupling bandwidth are calculated in detail. The MCE of the GOW and the MO bandwidth can be increased significantly in a double-layered magnetic film structure by properly choosing the thicknesses of two magnetic layers and a separation layer. © 2004 American Institute of Physics. [ABSTRACT FROM AUTHOR]

The excitation and propagation characteristics of magnetostatic backward volume wave in a double-layered magnetic film structure with magnetic damping are investigated theoretically. The dispersion, the attenuation constant, and the insertion loss can be decreased and the excitation bandwidth can be increased significantly by using a double-layered structure. The propagation constant and the attenuation constant depend strongly on the physical and geometrical parameters of the magnetic film with large thickness. The excitation characteristics are associated not only with the physical and geometrical parameters of the two magnetic layers and the separation layer, but also with the location and geometrical parameters of the microstrip transducer. The effects of the magnetic damping on the radiation resistance and the propagation constant of the magnetostatic wave (MSW) are weak, and the presence of the magnetic damping mainly leads to the propagation loss of the MSW. In addition, the excitation of the MSW is the main bandwidth-limiting mechanism in a double-layered structure. © 2003 American Institute of Physics. [ABSTRACT FROM AUTHOR]

Presents a study that discussed a transition model and Faraday rotation in ferromagnetic media. Background on the quantum theory of Faraday rotation; Information on the Faraday rotation in different temperature regions; Calculation of the Faraday effect in ferromagnetic media.