All-Dielectric Resonant Metasurfaces with a Strong Toroidal Response

Vladimir R. Tuz; Vyacheslav V. Khardikov; Yuri S. Kivshar

doi:10.1021/acsphotonics.8b00098

All-Dielectric Resonant Metasurfaces with a Strong Toroidal Response

Vladimir R. Tuz^*, Vyacheslav V. Khardikov, Yuri S. Kivshar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

140 Citations (Scopus)

Abstract

We demonstrate how to design all-dielectric metasurfaces with a strong axial toroidal response by arranging two types of nanodisks into asymmetric quadrumer clusters. This toroidal response is related to the existence of the trapped (dark) mode that appears due to a symmetry breaking in the cluster. We uncover a correlation between the existence of the toroidal response and asymmetry in the metasurface geometries, which originates from different diameters of nanodisks or notches introduced into nanodisks. Because of the unique field configuration of the toroidal mode, the proposed metasurface could serve as a platform for efficient light-matter interaction for enhanced absorption, nonlinear response, and sensing.

Original language	English
Pages (from-to)	1871-1876
Number of pages	6
Journal	ACS Photonics
Volume	5
Issue number	5
DOIs	https://doi.org/10.1021/acsphotonics.8b00098
Publication status	Published - 16 May 2018

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title = "All-Dielectric Resonant Metasurfaces with a Strong Toroidal Response",

abstract = "We demonstrate how to design all-dielectric metasurfaces with a strong axial toroidal response by arranging two types of nanodisks into asymmetric quadrumer clusters. This toroidal response is related to the existence of the trapped (dark) mode that appears due to a symmetry breaking in the cluster. We uncover a correlation between the existence of the toroidal response and asymmetry in the metasurface geometries, which originates from different diameters of nanodisks or notches introduced into nanodisks. Because of the unique field configuration of the toroidal mode, the proposed metasurface could serve as a platform for efficient light-matter interaction for enhanced absorption, nonlinear response, and sensing.",

keywords = "Mie theory, metamaterials, nanostructures, subwavelength structures, trapped modes",

author = "Tuz, {Vladimir R.} and Khardikov, {Vyacheslav V.} and Kivshar, {Yuri S.}",

note = "Publisher Copyright: {\textcopyright} 2018 American Chemical Society.",

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AU - Tuz, Vladimir R.

AU - Khardikov, Vyacheslav V.

AU - Kivshar, Yuri S.

PY - 2018/5/16

Y1 - 2018/5/16

N2 - We demonstrate how to design all-dielectric metasurfaces with a strong axial toroidal response by arranging two types of nanodisks into asymmetric quadrumer clusters. This toroidal response is related to the existence of the trapped (dark) mode that appears due to a symmetry breaking in the cluster. We uncover a correlation between the existence of the toroidal response and asymmetry in the metasurface geometries, which originates from different diameters of nanodisks or notches introduced into nanodisks. Because of the unique field configuration of the toroidal mode, the proposed metasurface could serve as a platform for efficient light-matter interaction for enhanced absorption, nonlinear response, and sensing.

AB - We demonstrate how to design all-dielectric metasurfaces with a strong axial toroidal response by arranging two types of nanodisks into asymmetric quadrumer clusters. This toroidal response is related to the existence of the trapped (dark) mode that appears due to a symmetry breaking in the cluster. We uncover a correlation between the existence of the toroidal response and asymmetry in the metasurface geometries, which originates from different diameters of nanodisks or notches introduced into nanodisks. Because of the unique field configuration of the toroidal mode, the proposed metasurface could serve as a platform for efficient light-matter interaction for enhanced absorption, nonlinear response, and sensing.

KW - Mie theory

KW - metamaterials

KW - nanostructures

KW - subwavelength structures

KW - trapped modes

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ER -

All-Dielectric Resonant Metasurfaces with a Strong Toroidal Response

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