4.8 Article

Ultraviolet-Visible Multifunctional Vortex Metaplates by Breaking Conventional Rotational Symmetry

Journal

NANO LETTERS
Volume 23, Issue 4, Pages 1195-1201

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c04193

Keywords

broadband; multifunctional; structured beams; metaplates; rotational symmetry; orbital angular momentum

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Recent advancements in technology have allowed for the manipulation of light's intrinsic properties using Metasurfaces. This study presents a broadband multifunctional Metasurfaces platform that can independently control the phase profile for two orthogonal polarization states of incident light over dual-wavelength spectra.
Metasurfaces have shown remarkable potential to manipulate many of light's intrinsic properties, such as phase, amplitude, and polarization. Recent advancements in nano fabrication technologies and persistent efforts from the research community result in the realization of highly efficient, broadband, and multifunctional metasurfaces. Simultaneous control of these characteristics in a single-layered metasurface will be an apparent technological extension. Here, we demonstrate a broadband multifunctional metasurface platform with the unprecedented ability to independently control the phase profile for two orthogonal polarization states of incident light over dual -wavelength spectra (ultraviolet to visible). In this work, multiple single layered metasurfaces composed of bandgap-engineered silicon nitride nanoantennas are designed, fabricated, and optically characterized to demonstrate broadband multifunctional light manipulation ability, including structured beam generation and meta-interferometer implementation. We envision the presented metasurface platform opening new avenues for broadband multifunctional applications including ultraviolet-visible spectroscopy, spatially modulated illumination microscopy, optical data storage, and information encoding.

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