Bilayer photonic crystal photoswitch thin-film device and preparation method thereof
US12242048B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2020 |
| Grant date | Mar 4, 2025 |
| Priority date | — |
| Expiry date | Jan 15, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F2202/32
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A bilayer photonic crystal photoswitch thin-film device having the optical characteristics of both 2D and 3D photonic crystals, and a preparation method thereof are provided. When the bilayer photonic crystal photoswitch thin-film device is rotated periodically, different colors can be observed at a fixed rotation angle, that is, the device has the attribute of changing colors by means of rotation, and can thus realize the opening and closing of an optical path. The bilayer photonic crystal photoswitch thin-film new device has broad application prospects in the fields of photoswitches, optical waveguides, optical prisms, warming signs, anti-counterfeiting and information coding, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.