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Power beam splitter based on photonic crystal row of holes and Brewster effect in SOI waveguides

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Abstract

This Letter presents a beam splitter in a silicon-on-insulator (SOI) ridge waveguide loaded by a photonic crystal row of holes close to the Brewster angle. The propagation of the fundamental guided mode in this structure has been examined by the three-dimensional finite-difference time-domain method. It is shown that a TE-polarized optical beam exhibits the Brewster effect at an incident angle of about 39°, giving a small splitting ratio (<0.04) in a wide spectral range for silica-filled holes with a typical diameter of 200 nm and a spacing of 300 nm. The row of holes close to the Brewster angle is the perspective to be used in developing complementary metal-oxide semiconductor-compatible tunable devices based on multireflector filtering technology.

© 2010 Optical Society of America

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