Air stable, color tunable plasmonic structures for ultraviolet (UV) and visible wavelength applications
US9063353B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2012 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | May 26, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/834
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A plasmonic optical device is provided operating in near ultra violet (UV) and visible wavelengths of light. The optical device is made from a substrate and nanoparticles. The nanoparticles have a core with a negative real value relative permittivity of absolute value greater than 10 in a first range of wavelengths including near UV and visible wavelengths of light, and a shell with an imaginary relative permittivity of less than 5 in the first range of wavelengths. A dielectric overlies the substrate, and is embedded with the nanoparticles. If the substrate is reflective, a reflective optical filter is formed. If the substrate is transparent, the filter is transmissive. In one aspect, the dielectric is a tunable medium (e.g., liquid crystal) having an index of refraction responsive to an electric field. The tunable medium is interposed between a first electrode and a second electrode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.