Tunable infrared pixels having unpatterned graphene layer and conductive metasurface
US11482560B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2020 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | May 30, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/193
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A monolithically integrated, tunable infrared pixel comprises a combined broadband detector and graphene-enabled tunable metasurface filter that operate as a single solid-state device with no moving parts. Functionally, tunability results from the plasmonic properties of graphene that are acutely dependent upon the carrier concentration within the infrared. Voltage induced changes in graphene's carrier concentration can be leveraged to change the metasurface filter's transmission thereby altering the “colors” of light reaching the broadband detector and hence its spectral responsivity. The invention enables spectrally agile infrared detection with independent pixel-to-pixel spectral tunability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.