Transmittance Magneto-Optical Responses of One-Dimensional Magnetophotonic Heterostructures

Transmittance magneto-optical responses of one-dimensional magnetophotonic heterostructures are investigated using 4 by 4 transfer matrix method. It is shown that in a simple magnetophotonic heterostructure constituted of two different periodic structures, the enhanced Faraday rotation associated with high transmittance at a desired wavelength can be realized with specifying optimized repetition numbers and adjusting the thicknesses of the substructure layers. However, the unique features of multichanneled enhanced Faraday rotations are obtained for different configurations of a multiple magnetophotonic heterostructure and the most suitable one to simultaneously support the both resonance wavelengths of 1.3 mu m and 1.55 mu m are introduced. These wavelengths are currently used in telecommunication systems. Then the obtained results may have potential applications in designing the multi-function single magneto-optical devices such as multiple Faraday rotators and wavelength division multiplexing systems.