Patent ID: 8798414

Claim:
A method for deterministically making a nanobeam cavity without fine tuning, resizing and rescaling of the structure of the nanobeam cavity, wherein said nanobeam cavity is based on optical strip waveguides along which dielectric index alternations provide constructive interference and produce optical resonance and wherein said nanobeam cavity has a plurality of grating sections, comprising the steps of: selecting a period for said nanobeam cavity, wherein said period is fixed throughout the beam and said selected period opens a band gap; forming said nanobeam cavity to have a width selected to push a fundamental mode of said nanobeam cavity away from a light line; etching a first hole in a first grating section of said nanobeam cavity using a first filling fraction; etching a second hole in a second grating section of said nanobeam cavity using a second filling fraction, said second filling fraction being different than said first filling fraction; and etching a third hole in a third grating section of said nanobeam cavity using a third filling fraction, said third filling fraction being different than said first and said second filling fractions; wherein differences in sizes of said first, second and third holes create linearly increasing mirror strengths for said first, second and third grating sections.