Abstract
Augmented reality devices, as smart glasses, enable users to see both the real world and virtual images simultaneously. Recently, waveguides incorporating holographic optical elements have been utilized in various grating structures to reduce the size and weight of the smart glasses, instead of bulky free-space headsets. However, these devices typically still possess physical and performance limitations, which lead to limited display quality and high cost. Here we report metasurface optical elements as a platform solution to these shortcomings. Through careful control of dispersion in the excited propagation and diffraction modes, we design a high-resolution waveguide display to the human eye box, with large field-of-view and in a full-color implementation. Supported by our combination of analytical and numerical simulations, we examine a metasurface optical waveguide with high input-output efficiency and high-resolution, implemented in a single metasurface layer.
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