INTERACTION OF LIGHT WITH A NONLINEAR SPIN-WAVE IN A NORMALLY MAGNETIZED FERROMAGNETIC FILM

A strong collinear magneto-optical interaction of guided light with an intensive forward volume spin wave (SW) has been studied in a normall y magnetized film. A numerical perturbation technique has been develop ed to quantify the effects, which accompany the optical diffraction. E xtensive numerical simulations of the magneto-optical diffraction by t he SW affected by nonlinear automodulation were carried out. The param eters of interaction related to automodulation mechanisms were varied within a wide range of values, covering most practical situations. Spe cifically, the automodulation frequency assumed values of 1 MHz<F<100 MHz, and the index of phase modulation, linear in modulation instabili ty threshold, the values of 1<v<4. (C) 1996 American Institute of Phys ics.