Interaction of guided optical waves and magnetostatic forward volume wavesin a double-layered waveguide under inclined magnetic field

The noncollinear interaction between the guided optical waves (GOWs) and ma gnetostatic forward volume waves (MSFVWs) is theoretically studied in a dou ble-layered waveguide under inclined magnetic field. The diffraction effici ency (DE) and the mode-conversion efficiency of GOWs are calculated numeric ally 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-matc hing conditions, the DE may be greatly enhanced by using an appropriately i nclined magnetic field in the double-layered waveguide. In addition, by var ying the inclination angle of the field and the interval of the double-laye red waveguide, the magneto-optical (MO) coupling between the GOWs and MSFVW s can be adjusted in the larger range. It is possible to improve the perfor mances of the MO waveguide devices more effectively. (C) 2001 American Inst itute of Physics.