Nano-structured zero-order diffractive filter
AssigneeCsem Centre Suisse D'Electronique Et De Microtechnique SA—Recherche Et DéVeloppement
InventorsAlexander Stuck, Harald Walter
Life of this patent
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Abstract
A zero order diffractive filter for polarised or unpolarised polychromatic light, comprises a grating line (10) microstructure (1) formed by a surrounding medium (12) with low index of refraction nlow and a waveguiding layer (11) with high index of refraction nhigh, the grating lines (10) having a period length Λ that is smaller than the wavelength of light for which the filter is designed. A plurality of single nanostructures (2) with dimensions in the nanometre range is superposed on a first interface (13) between the surrounding medium (12) and the waveguiding layer (11).
Claims24
A zero order diffractive filter for polarised or unpolarised polychromatic light, comprising a grating line microstructure formed by a surrounding medium with low index of refraction nlow and a waveguiding layer with high index of refraction nhigh, the grating lines having a period length Λ that is smaller than the wavelength of light for which the filter is designed,
- characterized in that
- a plurality of single nanostructures with dimensions in the nanometre range is superposed on a first interface between the surrounding medium and the waveguiding layer.
Dependencies are inferred from the claim text.