Patent ID: 7336879
Filing Date: 2008-02-26
Classification: B82Y,G02B

Abstract:
1. A two-dimensional photonic crystal slab having a photonic band gap for light propagated through the slab, comprising: a slab member containing a material having a high refractive index; and sectors that are periodically arranged in the slab member, contain a material having a refractive index less than that to the slab member, and define the distribution of refractive index in the slab, wherein the low refractive index sectors have a shape with C wherein the low refractive index sectors have a regular triangular prism shape and satisfy the inequality 0.7<L/a≦1.0, where L represents the length of edges of triangular faces of the low refractive index sectors and a represents the minimum distance between the centers of the low refractive index sectors or the grating constant.