Abstract

We report high numerical aperture meta-lenses in the visible spectrum with focal spots as small as 0.65λ. Meta-lenses are based on ultra-thin titanium dioxide metasurface phase masks. They operate in transmission mode and are polarization-insensitive.

Keywords:
Optics Materials science Wavelength Numerical aperture Visible spectrum Polarization (electrochemistry) Aperture (computer memory) Optoelectronics Physics

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Topics

Metamaterials and Metasurfaces Applications
Physical Sciences →  Materials Science →  Electronic, Optical and Magnetic Materials
Advanced Antenna and Metasurface Technologies
Physical Sciences →  Engineering →  Aerospace Engineering
Orbital Angular Momentum in Optics
Physical Sciences →  Physics and Astronomy →  Atomic and Molecular Physics, and Optics
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