RIGHT-ANGLE WAVEGUIDE BASED ON CIRCULAR-HOLE-TYPE SQUARE-LATTICE PHOTONIC CRYSTAL AND DUAL COMPENSATION SCATTERING CYLINDERS WITH LOW REFRACTIVE INDEX
First Claim
1. A right-angle waveguide based on a circular-hole-type square-lattice photonic crystal and dual compensation scattering cylinders with low refractive index, characterized in that:
- said right-angle waveguide is built in a photonic crystal (PhC) formed from said first dielectric cylinders with low refractive index arranged in a background dielectric with high refractive index according to square lattice;
in said PhC, one row and one column of said first dielectric cylinders with low refractive index are removed to form the right-angle waveguide;
a second and a third dielectric cylinders with low refractive index are respectively arranged at two corners of the right-angle waveguide;
said second and said third dielectric cylinders are respectively compensation scattering cylinders;
said second and said third dielectric compensation scattering cylinders are cylinders with low refractive index or air holes; and
said first dielectric cylinders are circular cylinders with low refractive index or air holes.
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Abstract
A high-refractive-index double-compensation-scattering-cylinder right-angle waveguide of a hole-type square lattice photonic crystal, being a photonic crystal formed by arranging a first dielectric cylinder having a low refractive index in a background dielectric having a high refractive index in a square lattice; one row and one column of the first dielectric cylinders having a low refractive index are removed from the photonic crystal to form a right-angle waveguide; a second dielectric cylinder and a third dielectric cylinder having low refractive indexes are respectively arranged at two turns of the right-angle waveguide; and the second and third dielectric cylinders are compensation scattering cylinders, and are low-refractive-index cylinders or air holes, and the first dielectric cylinders are low-refractive-index cylinders or air holes. The right-angle waveguide has an extremely low reflectivity and an extremely high transmission rate, thus facilitating an integration of a large-scale light path.
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Citations
9 Claims
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1. A right-angle waveguide based on a circular-hole-type square-lattice photonic crystal and dual compensation scattering cylinders with low refractive index, characterized in that:
- said right-angle waveguide is built in a photonic crystal (PhC) formed from said first dielectric cylinders with low refractive index arranged in a background dielectric with high refractive index according to square lattice;
in said PhC, one row and one column of said first dielectric cylinders with low refractive index are removed to form the right-angle waveguide;
a second and a third dielectric cylinders with low refractive index are respectively arranged at two corners of the right-angle waveguide;
said second and said third dielectric cylinders are respectively compensation scattering cylinders;
said second and said third dielectric compensation scattering cylinders are cylinders with low refractive index or air holes; and
said first dielectric cylinders are circular cylinders with low refractive index or air holes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- said right-angle waveguide is built in a photonic crystal (PhC) formed from said first dielectric cylinders with low refractive index arranged in a background dielectric with high refractive index according to square lattice;
Specification