Tunable liquid crystal metasurfaces
US11355858B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2020 |
| Grant date | Jun 7, 2022 |
| Priority date | — |
| Expiry date | Jan 22, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/22
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A tunable, optical metasurface can include an optically reflective surface to reflect optical radiation, such as infrared laser light. An array of optical resonant antennas may, for example, extend from or otherwise be positioned on the reflective surface with sub-wavelength spacings of, for example, less than one-half of a wavelength. Voltage-controlled liquid crystal may be positioned in the optical field region of each of the optical resonant antennas. A controller may apply a voltage differential bias pattern to the liquid crystal of optical resonant antennas, that may be arranged in tiled, interleaved, or randomly arranged subsets of optical resonant antennas to attain one-dimensional beam steering, two-dimensional beam steering, and/or spatial beam shaping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.