Reflective polarization volume gratings for high efficiency waveguide-coupling augmented reality displays

We demonstrate a reflective liquid-crystal polarization volume grating with high efficiency for augmented reality displays. The coupling efficiency was measured to be 90% at 650 nm and 50° deflection angle. The angular dependence of reflection band agrees well with Bragg condition, and the transmitt...

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Bibliographic Details
Published in:Optics express 2017-10, Vol.25 (22), p.27008-27014
Main Authors: Lee, Yun-Han, Yin, Kun, Wu, Shin-Tson
Format: Article
Language:English
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Summary:We demonstrate a reflective liquid-crystal polarization volume grating with high efficiency for augmented reality displays. The coupling efficiency was measured to be 90% at 650 nm and 50° deflection angle. The angular dependence of reflection band agrees well with Bragg condition, and the transmittance of environment light is high with negligible scattering. The bandwidth can be tailored by controlling the layer periodicity, allowing versatile applications and design freedom not only for augmented realities but also for other photonic devices.
ISSN:1094-4087
1094-4087
DOI:10.1364/oe.25.027008