Toroidal response in all-dielectric metamaterials based on water

Stenishchev, Ivan V.; Basharin, Alexey A.

doi:10.1038/s41598-017-07399-y

Cited by 61 publications

(24 citation statements)

References 26 publications

(24 reference statements)

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“…2D metamaterials or metasurfaces stand out due to the simplicity of fabrication and exhibits desirable optical properties. [11,22,[31][32][33][34][35][36][37][38][39] Nevertheless, we should mention the ref. [40], in which the possibility of an anapole excitation in 3D plasmonic toroidal metamaterials of the optical range has been shown.…”

Section: Introductionmentioning

confidence: 99%

Anapole Mode Sustaining Silicon Metamaterials in Visible Spectral Range

Ospanova

Stenishchev

Basharin

2018

Laser & Photonics Reviews

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This paper is dedicated to a type of perforated silicon metamaterials, possessing anapole mode in visible spectral range due to destructive interference between electric and toroidal dipole moments. The proposed structure gains both in attainable material and simplified fabrication. Such a material exhibits a desirable physical effect and has obvious practical application: it supports the anapole mode without complicated 3D toroidal geometry and can be processed in one step by nanofabrication methods. The metamaterial paves the way for advanced optical devices on the base of all‐dielectric metamaterials. Besides inherently low dissipative losses and strong anapole response, such an optical metamaterial can demonstrate subtle sensing, nonradiative data transfer, Aharonov‐Bohm effect and other tempting applications in nanophotonics.

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Section: Introductionmentioning

confidence: 99%

Anapole Mode Sustaining Silicon Metamaterials in Visible Spectral Range

Ospanova

Stenishchev

Basharin

2018

Laser & Photonics Reviews

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“…However, since the particles have a simple shape being made of a nonmagnetic material, a toroidal response can be excited in a single particle of a larger size, 30 but to excite a strong toroidal moment, we should consider a cluster (meta-molecule) of dielectric particles. 18,31,32 Depending on the light polarization and spatial symmetry of the meta-molecule forming the metamaterial, different strategies are proposed to excite the toroidal moment. Thus, an electromagnetic wave, with either linear, 21 radial, 33 or circular polarization, 17,34 has been used to illuminate the metamaterials normally, laterally, or obliquely (in fact, split-ring res-onator's based metamaterials usually are illuminated from the lateral direction).…”

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confidence: 99%

All-Dielectric Resonant Metasurfaces with a Strong Toroidal Response

2018

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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. 1 arXiv:1801.07131v1 [physics.optics] 22 Jan 2018Toroidal multipoles appear as fundamental electromagnetic excitations different from the familiar electric and magnetic multipoles. 1 It is known that electric multipoles result from positive and negative charges positioned over a distance, whereas magnetic multipoles are produced by electric currents circulating on a contour. In contrast, the simple member of the toroidal multipoles, a magnetic (polar ) toroidal dipole, is created by poloidal electric currents flowing on a surface of a torus along its meridians. Such a current flow can be represented as a set of magnetic dipoles arranged head-to-tail to form a closed ring. A dual counterpart of the polar toroidal dipole is an electric (axial ) toroidal dipole, which is composed by a ring of the electric dipolar configurations. 2,3 Mathematically speaking, both

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“…In fact, water is an available elementary component for laboratory prototyping of electromagnetic effects, such as Mie resonance in all-dielectric particles, [18] phase diagrams in nanophotonics, [43] perfect absorbers, etc. [14,[44][45][46][47][48] Since water is a liquid-state dielectric, we have a chance to "look into" water metamolecules to find out what exactly happens with electromagnetic fields inside dielectrics [49] as well as to confirm the theory of Mie scattering on dielectric particles and even legitimize Maxwell's theory describing the behavior of electromagnetic waves in dielectrics.…”

Section: Introductionmentioning

confidence: 99%

Toroidal Dipole Mode Observation In Situ

Pavlov

Stenishchev

Ospanova

et al. 2019

Physica Status Solidi (b)

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Besides classical dipole moments, the metaparticles are characterized by toroidal dipole moments that are important for numerous applications ranging from strong field localizations to anapole modes and the dynamic Aharonov–Bohm effect. On the other hand, the toroidal and electric dipole radiation are undistinguished by external observers due to identical radiation patterns. Therefore, the importance of toroidal dipole moments in multipole expansion is questioned by many researchers. However, a long‐awaited unanswered question is—what is going on inside a toroidal metamolecule and is its near‐field distribution distinct from the electric dipole field? Herein, the toroidal dipole mode is experimentally confirmed in situ by proof‐of‐concept measurements of electric and magnetic fields inside properly fabricated water metamolecules with toroidal topology in the microwave frequency range.

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Toroidal response in all-dielectric metamaterials based on water

Cited by 61 publications

References 26 publications

Anapole Mode Sustaining Silicon Metamaterials in Visible Spectral Range

Anapole Mode Sustaining Silicon Metamaterials in Visible Spectral Range

All-Dielectric Resonant Metasurfaces with a Strong Toroidal Response

Toroidal Dipole Mode Observation In Situ

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