Design of super narrow band and comb-shaped multi-channel photonic crystal filters

In this paper, two kinds of photonic crystals are designed. One is the super narrow band optical filter, the other is the comb-shaped multi-channel optical filter. Based on the transfer matrix method, after inserting one layer of heterogeneous medium into two different homogeneous mediums, a super narrow pass band with a 100% transmitivity can be obtained near 1 550 nm by adopting a dissymmetric structure and adjusting parameters in this crystal. In the complex-period optical crystal integrated by mediums with two alternatively distributed high and low refractive indexes whose complex period is combined by two separate cell periods, by following the law that the channel number is calculated by subtracting one from the complex-period number, a comb-shaped 8-channel and a comb-shaped 16-chan