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Proceedings Paper

Wide field-of-view waveguide displays enabled by polarization-dependent metagratings
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Paper Abstract

We proposed a waveguide display design based on polarization dependent metagratings. By encoding the left and right half of field of view (FOV) in two orthogonal polarization channels, we achieved an overall horizontal FOV of 67° at 460 nm using a single waveguide, which is 70% larger than that achieved with conventional diffractive gratings. Metagratings that selectively diffract out TE or TM polarized light are designed and simulated using rigorous coupled wave analysis (RCWA). High polarization selectivity is achieved, with minimal crosstalk between the two channels. The transmission spectrum at normal incidence is calculated to assess the see-through effect. Remaining challenges such as fabrication and efficiency issues are discussed. The concept of multiplexing information in the polarization domain enables wide FOV waveguide displays for future AR devices.

Paper Details

Date Published: 21 May 2018
PDF: 6 pages
Proc. SPIE 10676, Digital Optics for Immersive Displays, 1067615 (21 May 2018); doi: 10.1117/12.2315635
Show Author Affiliations
Zhujun Shi, Harvard Univ. (United States)
Wei Ting Chen, Harvard Univ. (United States)
Federico Capasso, Harvard Univ. (United States)

Published in SPIE Proceedings Vol. 10676:
Digital Optics for Immersive Displays
Bernard C. Kress; Wolfgang Osten; Hagen Stolle, Editor(s)

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