Low price Achromatic Doublet Lenses on all-dielectric metasurface-based achromatic lenses

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An achromatic lens based on an all-dielectric metasurface, comprising: a substrate and a double-layer metasurface on the substrate; the substrate is covered with a layer of low dielectric constant material, and a nanostructure unit is distributed on the surface of the substrate and filled in the low dielectric constant. In the dielectric constant material layer, two nanostructure units are distributed on the surface of the low dielectric constant material layer, and one nanostructure unit and two nanostructure units adopt different phase distributions to form a double-layer metasurface. The double-layer achromatic proposed by the present invention The lens solves the problem of mutual restriction between the phase dispersion and efficiency required by achromatic optical devices, which is conducive to the realization of high-performance broadband achromatic devices and the combination of device integrated optical systems.
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