Figure | Comparison between conventional waveguide and metasurface waveguide. (IMAGE)
Caption
a Conventional waveguide couples light into the waveguide through first-order diffraction, resulting in wavelength-dependent deflection angles. b K-vector diagram of the conventional waveguide, showing a smaller overlapping full-color field of view. c Metasurface waveguide achieves achromatic light coupling through higher-order diffraction. d K-vector diagram of the metasurface waveguide, demonstrating a larger full-color field of view.
Credit
by Zhongtao Tian, Xiuling Zhu et al.
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License
CC BY