Polarizing beam-splitter based on defective photonic crystals

The performance of a polarizing beam splitter based on the one-dimensional photonic crystals (1D-PCs), is theoretically investigated. The polarizing beam splitter consists of a symmetric stack of the low-index quarter-wave plates and the high-index half-wave plates with a central defect layer of air. The linear transmission properties of the polarizing beam splitter are numerically simulated by the transfer matrix method. The results show that the wavelength of the polarizing beam splitter can be tuned by adjusting the thickness of the defect layer of air and the incident angle of light due to the resonant couple of the evanescent waves localized at the interfaces between neighboring layers.