Metasurfaces for redirecting light and methods for fabricating
US12248166B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2023 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Sep 11, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0134
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A display system comprises a waveguide having light incoupling or light outcoupling optical elements formed of a metasurface. The metasurface is a multilevel (e.g., bi-level) structure having a first level defined by spaced apart protrusions formed of a first optically transmissive material and a second optically transmissive material between the protrusions. The metasurface also includes a second level formed by the second optically transmissive material. The protrusions on the first level may be patterned by nanoimprinting the first optically transmissive material, and the second optically transmissive material may be deposited over and between the patterned protrusions. The widths of the protrusions and the spacing between the protrusions may be selected to diffract light, and a pitch of the protrusions may be 10-600 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.