Magnetic films with laminar domain structure as tunable 1D photonic crystal

Summary form only given. Photonic band gap (PBG) materials, or photonic crystals, which can be presented as one-, two-, or three dimensional superstructures, are the object of intensive theoretical and experimental research, because it are very promising for applications in opto-electronics In our contribution we investigate PBG effects in magnetic film with stripe domain structure of 180/spl deg/ magnetic domains. Because the thickness of magnetic domains is very sensitive to the influence of internal magnetic field, it is possible to govern the position of PBG's by changing the magnitude of magnetic field. Using the transfer matrix method we have calculated PBG effects in yttrium-iron garnet film. Dependence of forbidden gaps in the electromagnetic wave spectrum on thickness of magnetic domain (i.e., on internal magnetic field) is numerically studied.