All-dielectric resonant metasurfaces with a strong toroidal response

Abstract

We demonstrate how to create all-dielectric metasurfaces with a strong toroidal response by arranging two types of nanodisks into asymmetric quadrumer clusters. We demonstrate that a strong axial toroidal response of the metasurface is related to conditions of the trapped (dark) mode that is excited due the symmetry breaking in the cluster. We study the correlation between the toroidal response and asymmetry in the metasurface and nanocluster geometries, which appears from the different diameters of nanodisks or notches introduced into the nanodisks.

arXiv comment17 pages, 6 figures

References in corpus (16)

• High-efficiency light-wave control with all-dielectric optical Huygens' metasurfaces
• Sharp dark-mode resonances in planar metamaterials with broken structural symmetry
• Dielectric Metamaterials with Toroidal Dipolar Response
• Toroidal metamaterial
• High-quality trapped modes in all-dielectric metamaterials
• Optical toroidal dipolar response by an asymmetric double-bar metamaterial
• Toroidal dipole response in a multifold double-ring metamaterial
• Strong gyrotopy in a chiral toroidal medium
• Toroidal optical activity
• All-optical Hall effect by the dynamic toroidal moment in a cavity-based metamaterial
• Toroidal eigenmodes in all-dielectric metamolecules
• Giant red shift and enhancement of resonant light confinement in planar array of dielectric bars
• Optical bistability involving planar metamaterial with broken structural symmetry
• All-optical switching in metamaterial with high structural symmetry
• Nonlinear interaction of two trapped-mode resonances in a bilayer fish-scale metamaterial
• Electromagnetic wave diffraction by periodic planar metamaterials with nonlinear constituents

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• Controlling high-Q trapped modes in polarization-insensitive all-dielectric metasurfaces
• Enhancing Goos-Hänchen shift based on magnetic dipole quasi-bound states in the continuum in all-dielectric metasurfaces
• All-dielectric metasurfaces with trapped modes: group-theoretical description
• Loss-induced performance limits of all-dielectric metasurfaces for terahertz sensing
• Symmetry analysis of trimer-based all-dielectric metasurfaces with toroidal dipole modes
• Engineering light absorption at critical coupling via bound states in the continuum
• Ultra-narrowband polarization insensitive transmission filter using a coupled dielectric metal metasurface
• Enhancing Faraday and Kerr rotations based on toroidal dipole mode in an all-dielectric magneto-optical metasurface
• Toroidic and antitoroidic orders in hexagonal arrays of dielectric trimers: magnetic group approach
• Quasi-trapped modes in metasurfaces of anisotropic MoS${}_2$ nanoparticles for absorption and polarization control in the telecom optical range
• Transition between radial and toroidal orders in a trimer-based magnetic metasurface