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Updated: Sep 18, 2025

Demonstration of Equal-Intensity Beam Generation by Dielectric Metasurfaces
Published on: June 7, 2019
Polarization Conversion and Optical Meron Topologies in Anisotropic Epsilon-Near-Zero Metamaterials
Vittorio Aita1, Anastasiia Zaleska1, Henry J Putley1,2
1Department of Physics and London Centre for Nanotechnology, King's College London, Strand, London WC2R 2LS, U.K.
Abstract:
Plasmonic metamaterials provide a flexible platform for light manipulation and polarization management thanks to their engineered optical properties with exotic dispersion regimes. Here we exploit the enhanced spin-orbit coupling induced by the strong anisotropy of plasmonic nanorod metamaterials to control the polarization of vector vortex beams and generate complex field structures with meron topology. Modifying the degree of ellipticity of the input polarization, we show how the observed meron topology can be additionally manipulated. Flexible control of the state of polarization of vortex beams is important in optical manipulation, communications, metrology, and quantum technologies.
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Isomers are different chemical species that have the same chemical formula.
Transition metal complexes often exist as geometric isomers, in which the same atoms are connected through the same types of bonds but with differences in their orientation in space. Coordination complexes with two different ligands in the cis and trans positions from a ligand of interest form isomers. For example, the octahedral [Co(NH3)4Cl2]+ ion has two isomers (Figure 1) In the cis...

