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Low-loss Subwavelength Grating Waveguide Bends Based on Index Engineering

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Abstract

We report the design, simulation and experimental demonstration of low loss subwavelength grating waveguide (SWG) bends. With trapezoidal shape silicon pillars, the average insertion loss of a 5μm SWG waveguide bend is reduced drastically from 5.43 dB to 1.10 dB per 90° bend for quasi-TE polarization.

© 2016 Optical Society of America

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