Photonic band gap materials based on spiral posts in a lattice
CA 2363277 A1 · Owner: The Governing Council Of The University Of Toronto · Inventors: Toader, Ovidiu; John, Sajeev
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to photonic band gap (PBG) materials and more specifically, it describes a new type of photonic crystal structure which exhibits a large and complete three-dimensional PBG. This PBG is highly robust to the effects of disorder. The photonic crystal has a tetragonal or hexagonal lattice symmetry and is comprised of a lattice of polygonal spiral posts of a high, refractive index material in a low index background. The corresponding inverse structure comprises a lattice of low refractive index posts in a high refractive, index background also has a very large PBG. These new photonic crystals exhibit very large (up to 23.6% when made of silicon and nearly 29% when …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 16, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 16, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 16, 2023.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.