Abstract
A grating-based narrowband wavelength selective reflector on silicon on insulator waveguide is proposed here. The 500 nm thick silicon waveguide is used in the reflector design. The design consists of dual-etch layers for different grating sets separated by the center cavity. The duty-cycle, grating-period, and side etching depth are optimized for achieving high reflection and narrow bandwidth. The proposed reflector shows a reflection of 96 % with a full-width half-maximum bandwidth of 1.5 nm at 1550 nm wavelengths.
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