Patent ID: 6996319

Claim:
A two-dimensional photonic crystal optical resonator using interference between point defects, characterized in that it comprises: a) a slab-shaped body; b) a plurality of modified refractive index areas having a refractive index different from that of the body, which are periodically arranged in the body; c) one waveguide formed in the body by making defects of the modified refractive index areas linearly; and d) a point-like defect pair consisting of two point-like defects of the same type, which are located in proximity to the waveguide and spaced apart from each other in the longitudinal direction of the waveguide by a distance (2n−1)/4 times as long as the resonance wavelength of interest, where n is a positive integer, and in that it extracts light from the waveguide in the body at one of the two point-like defects that is first encountered by the light propagating through the waveguide.