High-uniformity dielectric U-shaped surface relief grating coupler for AR headsets

O. Shramkova; V. Drazic; B. Varghese; L. Blondé; V. Brac De La Perriere; V. Allié

doi:10.1117/12.2594466

1 August 2021 High-uniformity dielectric U-shaped surface relief grating coupler for AR headsets

O. Shramkova, V. Drazic, B. Varghese, L. Blondé, V. Brac De La Perriere, V. Allié

Proceedings Volume 11802, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVIII; 118020D (2021) https://doi.org/10.1117/12.2594466
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States

Abstract

In this work we propose a new type of symmetrical surface relief diffractive grating for waveguide -based Augmented Reality near-eye display system with a wide Field of View (FoV). We demonstrate that by using a dual-mode symmetrical in-coupling system and angular pupil tiling, we can extend the overall horizontal FoV. Our grating coupler is optimized for the second diffraction orders. The proposed concept is validated numerically via full-wave electromagnetic analysis of a 1D diffraction grating. Measurements of the diffraction efficiency of the micro-fabricated prototype are compared with the results of the numerical simulation.

Conference Presentation

Citation Download Citation

O. Shramkova, V. Drazic, B. Varghese, L. Blondé, V. Brac De La Perriere, and V. Allié "High-uniformity dielectric U-shaped surface relief grating coupler for AR headsets", Proc. SPIE 11802, Nanoengineering: Fabrication, Properties, Optics, Thin Films, and Devices XVIII, 118020D (1 August 2021); https://doi.org/10.1117/12.2594466

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