Abstract
The noncollinear interaction between the guided optical waves (GOWs) and magnetostatic forward volume waves (MSFVWs) is theoretically studied in a double-layered waveguide under inclined magnetic field. The diffraction efficiency (DE) and the mode-conversion efficiency of GOWs are calculated numerically at the different inclination angles of the field. The results indicate that the double-layered waveguide, in which the top magnetic layer is made of the Bi-doped YIG film, can enhance the DE of GOWs. Under the phase-matching conditions, the DE may be greatly enhanced by using an appropriately inclined magnetic field in the double-layered waveguide. In addition, by varying the inclination angle of the field and the interval of the double-layered waveguide, the magneto-optical (MO) coupling between the GOWs and MSFVWs can be adjusted in the larger range. It is possible to improve the performances of the MO waveguide devices more effectively.
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