Patent ID: 8014643
Filing Date: 2011-09-06
Classification: B82Y,G02B

Abstract:
1. A photonic crystal waveguide inlet structure for improving coupling efficiency of a photonic crystal waveguide and a strip waveguide, the structure comprising an inlet region of the photonic crystal waveguide, wherein the photonic crystal waveguide includes: photonic crystals in which air holes are arranged in a triangle lattice shape in a dielectric; and the inlet region of the photonic crystal waveguide has a start point, and a position where the photonic crystal waveguide contacts the strip waveguide has a length of 3/2α from the start point, and the start point and the position where the photonic crystal waveguide contacts the strip waveguide of the inlet region of the photonic crystal waveguide are spaced with a same width that ranges from  from the strip waveguide and the inlet region is in rectangular form so that at least one air hole is removed in a widthwise direction, of the rectangular inlet region, wherein α is a lattice constant of the photonic crystal waveguide.