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° 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.