RIGHT-ANGLE WAVEGUIDE BASED ON CIRCULAR-CYLINDER-TYPE SQUARE-LATTICE PHOTONIC CRYSTAL AND DUAL COMPENSATION SCATTERING CYLINDERS WITH HIGH REFRACTIVE INDEX
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United States of America Patent
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Dec 30, 2016
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Sep 29, 2014
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Abstract
A right angle waveguide having a circular rod-type square lattice photonic crystal and dual compensation scattering rods having a high refractive index. The right angle waveguide is a photonic crystal formed from first dielectric rods having a high refractive index arranged in a background dielectric having a low refractive index according to a square lattice. In the photonic crystal, one row and one column of the first dielectric rods having the high refractive index are removed to form the right angle waveguide. Second and third dielectric rods having a high refractive index are respectively arranged at the two corners of the right angle waveguide, the second and third dielectric rods being the compensation scattering rods. The first dielectric rods are circular rods. The right angle waveguide has extremely low reflectance and a very high transmission rate, and facilitates large-scale optical path integration.
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