Theoretical Study of Multi-channel Polarization Tunable Filter of Photonic Crystal
光子晶体多通道可调谐偏振滤波器的理论研究

Through numerical calculation and theoretical analysis of the designed one-dimensional photonic crystal, the characteristics of P-wave and S-wave defect mode are given. Between 0.75 radon/2 rad, the P-wave has many obvious defect mode, but the S-wave has none. There are many defect mode of P-wave in the same thickness of the impurity. A three channel polarization tunable filter of photonic crystal is design. Its range of tunable wavelength is 60 nm, its range of tunable FWHM is 1 nm-5 nm, and its peak value of transmission exceeds 0.98.