Patent ID: 9122007
Filing Date: 2015-09-01
Classification: B82Y,G02B

Abstract:
1. A spectral filter comprising at least one metallic layer structured by at least one hole passing through two opposite main faces of the metallic layer and comprising, in a plane parallel to a plane of one of the two main faces, a first rectangular section such that a first side has a dimension between 40 nm and 100 nm, wherein a second side, perpendicular to the first side, has a dimension between 150 nm and 1000 nm, and a second rectangular section centred relative to the first rectangular section, and wherein a first side of the second rectangular section is parallel to the second side of the first rectangular section and has a dimension between 40 nm and 100 nm, wherein at least one of: the dimensions of the first side of the second rectangular section are different than the dimensions of the first side of the first rectangular section, and the dimensions of the second side of the second rectangular section are different than the dimensions of the second side of the first rectangular section.