Abstract
A new reflective polarization-selective grating with high diffraction efficiency is proposed based on a convex-shaped configuration in this paper. The efficiencies of 0th order, -1st order and -2nd order are 21.61 %, 19.65 % and 18.38 % for transverse electric (TE) polarization and the efficiencies of -1st order and -2nd order are 24.28 % and 24.32% for transverse magnetic (TM) polarization. When the incident wavelength (λ) and the period (d) of grating are in the range of 1415–1556 nm and 3395–3610 nm, efficiency of each order for TE polarization can be achieved more than 18 %. For TM polarization, efficiencies above 20 % can be obtained in all orders with λ range in 1474–1655 nm and d range in 3211–3596 nm. Compared with other gratings, the proposed grating in this paper has better performance with the broad incident wavelength bandwidth and period tolerance.
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