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We designed a subwavelength grating for polarization-independent two-port beam splitter. The design is based on the simplified modal method. Holographic recording technology and inductively coupled plasma etching can be used to manufacture the grating.
We investigated the use of Au wire-grid as the high efficient polarizing beam splitter (PBS). To achieve high extinction ratio and diffraction efficiency, the grating depth and period are optimized by using the rigorous coupled-wave analysis (RCWA).
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