Transmission properties of multilayer films composed of magneto-optical and dielectric materials

In this paper, we investigated the transmission properties of multilayer fi lms composed of magneto-optical and dielectric materials, in relation to la yer stacking structure. The basic structures are made of alternating layers of these materials having a conventional symmetric periodicity with the ce nter of the structure. Films with these basic structures exhibit an enhance d Faraday rotation effect, The rotation increases to an angle close to 45 d egrees, which is required for an optical isolator, as the repetition number of alternating layers increases, However, the transmittance decreases in t hese films as the rotation increases. To clarify the possibility of improvi ng the transmittance, we also investigated films composed of multiple stack s of the basic structures, We found that, by using the multiple stacks, the transmittance can be improved without degrading the rotation characteristi cs.