Polarization gaps in one-dimensional magnetic photonic crystal

We studied the property of magnetic photonic crystal by using the 4×4-matrix method. The transmittance cures and the corresponding band structures show that this kind of structure possesses significant polarization gaps. We find that application of an external static magnetic field causes the right-hand and left-hand circularly polarized waves to become separated, the polarization gap open up while the absolute photonic band gap disappears.