Antireflection coatings for metasurfaces

US11681153B2 · kind B2 · utility

Assignee

• Magic Leap, Inc. · US

Inventors

• Dianmin Lin · Los Altos, US
• Michael Anthony Klug · Austin, US
• Pierre St. Hilaire · Belmont, US
• Mauro Meili · San Leandro, US
• Christophe Peroz · San Francisco, US
• Evgeni Poliakov · San Mateo, US

Key dates

• Filing date: Jan 24, 2018
• Grant date: Jun 20, 2023
• Expiry date: May 20, 2038

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2207/101
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Antireflection coatings for metasurfaces are described herein. In some embodiments, the metasurface may include a substrate, a plurality of nanostructures thereon, and an antireflection coating disposed over the nanostructures. The antireflection coating may be a transparent polymer, for example a photoresist layer, and may have a refractive index lower than the refractive index of the nanostructures and higher than the refractive index of the overlying medium (e.g., air). Advantageously, the antireflection coatings may reduce or eliminate ghost images in an augmented reality display in which the metasurface is incorporated.