Patent ID: 9297939
Filing Date: 2016-03-29
CPC Classification: B82Y,G02B

Claim Text:
1. A spectral filtering device comprising at least: a substrate comprising at least one dielectric material; a first filter acting as a passband filter in the visible range and comprising a plurality of first nanostructures with a uniform spacing between each other and arranged on the substrate, each of the first nanostructures comprising a portion of dielectric material arranged between two portions of metallic material such that one of the two portions of metallic material is arranged between the substrate and the portion of dielectric material; a second filter acting as a passband filter in the infrared range and comprising a plurality of second nanostructures with a uniform spacing between each other and arranged on the substrate, each of the second nanostructures comprising a portion of dielectric material having a plurality of surfaces, of which only one surface is in contact with a portion of metallic material; and a superstrate material provided over the first and second nanostructures such that the superstrate material is interposed between side surfaces of adjacent nanostructures.