We describe the magnetization-induced second-harmonic (SH) generation in and the magnetization-induced third-harmonic (TH) generation in (Bi, Al:YIG). The polarization plane of a SH wave from a film was rotated by an applied external magnetic field. This SH rotation is ascribed to the interaction between the electric polarization along the out-of-plane and spontaneous magnetizations. In particular, the magnetic linear term contributed to the SH rotation. Applying a longitudinal external magnetic field to a Bi,Al:YIG magnetic film rotated the polarization plane of the TH wave. This TH rotation is understood by the contribution of the magnetic term of in a third-order nonlinear optical susceptibility.
© 2005 Optical Society of America