Research on transmission spectra of one-dimensional magneto-photonic crystals

摘要

A magneto-photonic crystal(MPC) is defined as a periodic light-guided structure involving magnetic materials or a photonic crystal with some magnetic-material defects.The transfer matrices of guided optical waves(GOWs) propagating respectively in magneto-optical and non-magnetic dielectric layers are deduced according to the coupled-mode theory.The transmission spectra of GOWs in one-dimensional magneto-photonic crystals(1D-MPC) are investigated by the transfer matrix method.It is shown that the two sharp peaks in the 1D-MPC's transmission spectra can be used for high-resolution magnetic field sensing;and a comb filter with six channels can be achieved by optimizing the 1D-MPC structure and controlling the external magnetic field.