Patent ID: 9335479
Filing Date: 2016-05-10
CPC Classification: G01J,G02B

Claim Text:
1. A device comprising: a substrate; at least one resonator on the substrate, each resonator being resonant at a predetermined wavelength of electromagnetic radiation and configured to support a whispering gallery resonant mode in which electromagnetic radiation of the predetermined wavelength is concentrated in a region adjacent to a circumference of each resonator; a waveguide on the substrate, coupled to the at least one resonator for guiding the electromagnetic radiation to the at least one resonator; and a low refractive index region between each resonator and the substrate, the low refractive index region having a lower refractive index than a material of the resonator, wherein the low refractive index region for each resonator has a width corresponding to a width of the region adjacent to a circumference of each resonator in which the electromagnetic radiation is concentrated, and wherein the low refractive index region is an air gap between the resonator and the substrate.