Surface layer magneto-optical effect on one-dimensional magneto-photonic crystal

Surface-layer magneto-optical effects of propagating and reflected light were calculated for photonic crystals of magnetic materials using a finite-difference time-domain algorithm. The magneto-optical effect of the reflected light on the photonic band-gap range strongly depended on the dielectric constant of the surface layer, although no such surface effect was observed near the first photonic band edge. When the dielectric constant of the surface layer was low, the polarization rotation angle of the reflected light increased with the frequency of the light, and reached a maximum value just below the second photonic band. This frequency dependence should be associated with the group delay time of the reflected light, and thus the large delay time just below the second photonic band should be caused by the localization mode in the surface layer. Due to the localized surface mode, the influence of the absorption of the medium on the polarization rotation angle strongly depends on the dielectric constant of the surface layer.