AI Article Synopsis
- Metasurfaces can enhance lenses by eliminating color distortions (chromaticity) when paired with traditional refractive lenses, but often leave some residual distortion due to limitations in the available metasurface designs.
- The authors propose a new design method that combines both the refractive elements and metasurface as a single unit to create a large-scale, achromatic hybrid lens without any residual dispersion.
- A successful prototype of this lens is demonstrated at a centimeter scale, showcasing improved performance compared to previous lens designs, providing valuable insights for future high-quality achromatic metalenses.
Article Abstract
Metasurface can be used in combination with singlet refractive lens to eliminate chromaticity, in which the metasurface usually works as a dispersion compensator. Such a kind of hybrid lens, however, usually has residual dispersion due to the limit of meta unit library. Here, we demonstrate a design method that considers the refraction element and metasurface together as a whole to achieve large scale achromatic hybrid lens with no residual dispersion. The tradeoff between the meta-unit library and the characteristics of resulting hybrid lenses is also discussed in detail. As a proof of concept, a centimeter scale achromatic hybrid lens is realized, which shows significant advantages over refractive lenses and hybrid lenses designed by previous methods. Our strategy would provide guidance for designing high-performance macroscopic achromatic metalenses.
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| http://dx.doi.org/10.1364/OE.493216 | DOI Listing |
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