Patent ID: 8879152
Filing Date: 2014-11-04
Classification: B82Y,G02B,H01L

Abstract:
1. An optical filter system that has at least one combination of a bandpass filter comprising a first nanostructured metallic layer having a first layer thickness, and a bandstop filter comprising a second nanostructured metallic layer having a second layer thickness, which are arranged one on top of the other, wherein the first nanostructured metallic layer forms a hole array and the second nanostructured metallic layer forms an island array, the bandstop filter is tuned to the bandpass filter in such a way that it blocks a contiguous wavelength range that partially overlaps a pass-band width of the bandpass filter, and wherein the first and second layer thicknesses differ from one another, the first layer thickness being selected between 150 nm and 250 nm and the second layer thickness being selected between 50 nm and 150 nm.