Patent ID: 8718112
Filing Date: 2014-05-06
Classification: G02B,H01S

Abstract:
1. An optical resonator structure, comprising: a substrate; a center disc formed on the substrate; and a plurality of perturbed concentric grating rings surrounding the center disc, the perturbed concentric rings spaced apart from the center disc and from one another by regions of lower index of refraction material with respect thereto; wherein spacing between an inner most of the perturbed grating rings and the center disc, and spacing between adjacent pairs of perturbed grating rings is non-periodic and a displacement distance-Δ of a given perturbed grating ring towards the center disc with respect to a corresponding unperturbed ring of an unperturbed concentric ring geometry having periodically spaced gratings with periodicity, a, is largest for the inner most of the grating rings immediately adjacent the center disk and decreases for each subsequently radially-outward grating ring.