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Subwavelength grating Bragg grating filters in silicon-on-insulator

Wang, J. and Glesk, I. and Chen, L. R. (2015) Subwavelength grating Bragg grating filters in silicon-on-insulator. Electronics Letters, 51 (9). pp. 712-714. ISSN 0013-5194

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Narrowband filters based on Bragg gratings (BGs) in subwavelength grating (SWG) waveguides in silicon-on-insulator are reported. The SWG BGs are fabricated using electron beam lithography with a single etch. For SWG BGs 1.12 mm in length, the measured 3 dB bandwidths are ~ 0.5 nm and have a peak reflectivity as high as 94.4% in the C-band.