Achromatic Varifocal Metalens for the Visible Spectrum

  title={Achromatic Varifocal Metalens for the Visible Spectrum},
  author={Maxwell D. Aiello and Adam S. Backer and Aryeh J. Sapon and Janis Smits and John D. Perreault and Patrick Llull and Victor M. Acosta},
  journal={ACS Photonics},
Metasurface optics provide an ultra-thin alternative to conventional refractive lenses. A present challenge is in realizing metasurfaces that exhibit tunable optical properties and achromatic behavior across the visible spectrum. Here, we report the design, fabrication, and characterization of metasurface lenses ("metalenses") that use asymmetric TiO2 nanostructures to induce a polarization-dependent optical response. By rotating the polarization of linearly-polarized input light, the focal… 

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