Patent ID: 6873777

Claim:
A two-dimensional photonic device comprising: a two-dimensional photonic crystal composed of a first medium layer having a first refractive index and pillars of a second medium having a refractive index different from that of said first medium layer and disposed therein in matrix form; a line waveguide formed in said two-dimensional photonic crystal by its crystal defects; and resonant pillars of said second medium disposed in said line waveguide, wherein said resonant pillars are a main pillar disposed at the center of said line waveguide in its widthwise direction, a first set of sub-pillars disposed at a light incidence side of said line waveguide with respect to said main pillar, and second set of sub-pillars disposed at a light emitting side of said line waveguide with respect to said main pillar, and wherein said first set of sub-pillars consists of two sub-pillars symmetrically arranged in respect of the center of said line waveguide in its widthwise direction.