title: Design of angularly tolerant zero-contrast grating filters for pixelated filtering in the mid-IR range.
abstract: Zero-contrast gratings (ZCG) can be used to implement narrow bandpass transmission filters. However, they suffer from poor angular tolerance, which hinders their use in pixelated applications. Combining ZCG with double-corrugation grating, we increase the resonance width and angular tolerance of the filter by more than 1 order of magnitude. Filters tunable around 4.6 μm with more than 90% transmission and compatibility with 140 μm pixel size are demonstrated.
authors.forename: Léopold
authors.initials: L
authors.lastname: Macé
authors.forename: Olivier
authors.initials: O
authors.lastname: Gauthier-Lafaye
authors.forename: Antoine
authors.initials: A
authors.lastname: Monmayrant
authors.forename: Henri
authors.initials: H
authors.lastname: Camon