Electrically-tunable optical filter
US11619857B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2021 |
| Grant date | Apr 4, 2023 |
| Priority date | — |
| Expiry date | Oct 13, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/857
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical device stack includes at least one of a photodetector or an optical emitter and a metasurface. The metasurface is disposed over a light-receiving surface of the photodetector or a light emission surface of the optical emitter. The metasurface includes a first conductive layer having an electrically-tunable optical property and an array of conductive nanostructures disposed on a first side of the first conductive layer. A second conductive layer is disposed on a second side of the first conductive layer. An electrical insulator is disposed between the first conductive layer and the second conductive layer. A change in an electrical bias between the metasurface and the second conductive layer, from a first electrical bias to a second electrical bias, tunes the electrically-tunable optical property from a first state to a second state, and changes an electrically-tunable optical filtering property of the metasurface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.