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 |
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Format: | Artikel |
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. |
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ISSN: | 1559-128X 2155-3165 1539-4522 |
DOI: | 10.1364/AO.421901 |