Plasmonic structured color filters for hyperspectral detection

Abstract

The aspects of the disclosed embodiments are directed to a filter that includes a substrate, a dielectric layer disposed on the substrate in a pattern, leaving exposed portions of the substrate. A metallic layer is deposited over the dielectric layer and exposed portions of the substrate forming metallic structures over the exposed portions of the substrate and complementary metal patterns on the dielectric layer. A face of the filter is configured in a complimentary square checkerboard pattern, alternating between the metallic structures over the exposed portions of the substrate and complementary metal patterns on the dielectric layer. The filter is configured to operate when wavelengths of light impinge upon the checkerboard face of the filter and excite the metallic structures that are patterned atop the dielectric layer.

Dependencies are inferred from the claim text.