Enhancement of Magneto-Optical Effect

Abstract

Large magneto-optical properties are highly desirable in isolators and such devices. Recently, magneto-optical Faraday effects have been greatly enhanced by localization of light and use of the nonlinear magneto-optical Kerr effect. This paper describes cases of the enhancement of magneto-optical effects: (1) the case in which ultra-fine magnetic particles are used; (2) the case in which localization of light is used, and (3) the case in which a grating is used with a magnetic thin film. The enhancement of the magneto-optical effects in these three cases is over 50 times that in other cases. The total rotation angle 34 degrees at 10 kG with a 100-nm magnetic thin film.