a research of magnetic control ferrite photonic crystal filter

In this article, an anisotropic magnetized ferrite photonic crystal model is analyzed by using the finite-difference time-domain method. the electromagnetic wave propagates in anisotropic ferrite material and forms two kinds of eigen propagation mode: left-hand circular polarization (lcp) mode and right-hand circular polarization (rcp) mode. therefore, the ferrite material is used to produce photonic crystal and wave polarized by these two kinds of polarization modes can be obtained. because the electromagnetic properties of the ferrite material are greatly influenced by the bias magnetic field, the ferrite photonic crystal band gap can be controlled by adjusting the intensity of the bias magnetic field, and then a magnetron photonic crystal filter is formed. the results show that the magnetic photonic crystal with the bias magnetic field to the lcp/rcp wave forms different pass band and band gap, which can obtain different forms of polarized wave.