The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 07, 2023
Filed:
Mar. 07, 2019
Interdigital Ce Patent Holdings, Paris, FR;
Oksana Shramkova, Cesson-Sévigné, FR;
Artem Boriskin, Thorigné-Fouillard, FR;
Mitra Damghanian, Cesson-Sévigné, FR;
Valter Drazic, Betton, FR;
Laurent Blonde, Thorigné-Fouillard, FR;
InterDigital CE Patent Holdings, Paris, FR;
Abstract
A diffraction grating includes a plurality of grating unit cells positioned in a periodic array on a substrate surface. In cross-section, a grating unit cell includes a homogeneous dielectric host medium with a first refractive index n, embedding at least a first block of a first dielectric material with a second refractive index n, a side edge of which is in direct contact with at least a second block of a second dielectric material with a third refractive index n. Both the first block and the second block have a trapezoidal cross-section. The plurality of grating unit cells provides a non-symmetrical response for positive first diffraction order and negative first diffraction order based on nanojet hot spot positions, the nanojets being generated at edges between dielectric materials with different refractive indexes.