Nearly dispersionless multicolor metasurface beam deflector for near eye display designed by a physics-driven deep neural network

Dispersion is one of the most important issues in see-through near eye displays with waveguide technology. In particular, the nanophotonics design is challenging but demanding. In this paper, we propose a design method for a multilayer achromatic metasurface structure for near eye display applicatio...

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Veröffentlicht in:Applied optics (2004) 2021-05, Vol.60 (13), p.3947-3953
Hauptverfasser: Chen, Wen-Qing, Zhang, Da-Sen, Long, Shang-Yu, Liu, Zhen-Zhen, Xiao, Jun-Jun
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Sprache:eng
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Zusammenfassung:Dispersion is one of the most important issues in see-through near eye displays with waveguide technology. In particular, the nanophotonics design is challenging but demanding. In this paper, we propose a design method for a multilayer achromatic metasurface structure for near eye display application by a physics-driven generative neural network. Two in-coupling metagratings under different projector illuminations are presented and numerically verified with the absolute diffraction efficiency over 89%. A beam splitter, which provides a balance between compactness and visual comfort in a single-projector-binocular display, is also designed. Finally, we apply this method to an out-coupling metasurface with the capability of enlarging the visible region by threefold.
ISSN:1559-128X
2155-3165
1539-4522
DOI:10.1364/AO.421901