All-Dielectric Resonant Metasurfaces with a Strong Toroidal Response

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

doi:10.1021/acsphotonics.8b00098

Cited by 148 publications

(103 citation statements)

References 47 publications

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“…For instance, similar structures have been discussed in ref. [28], in contrast to our case where the incident electric field is parallel with one of the symmetry axis of the meta-molecules. However, the two studies differ in two main aspects.…”

Section: Quadrumer Casecontrasting

confidence: 62%

Toroidal Dipole Resonances in All‐Dielectric Oligomer Metasurfaces

Zhang

Lan

Gao

et al. 2019

Advcd Theory and Sims

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Dynamic toroidal multipoles have been attracting an increasing amount of attention, thanks to their unique electromagnetic properties. The concept bears great promises in the field of optical sensing as well as electromagnetic energy localization. Metal-based structures with specific designs have been widely adopted to obtain toroidal responses. However, applications for such structures are often hindered by the significant intrinsic loss when it comes to optical frequencies. Here, several configurations of all-dielectric metasurfaces, in which the meta-molecules are composed of disk oligomers (trimer, quadrumer, pentamer, and hexamer), are proposed to support toroidal dipole resonances in the near-infrared waveband when the polarization of the normally incident excitation plane wave is directed to one of the symmetry axes of the oligomers. Multipole expansion including the toroidal dipole term along with near-field electromagnetic patterns confirms the existence of strong toroidal dipolar responses within certain wavelength ranges. This work would enrich the diversity of the all-dielectric optical systems with toroidal dipole resonances.

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Section: Quadrumer Casecontrasting

confidence: 62%

Toroidal Dipole Resonances in All‐Dielectric Oligomer Metasurfaces

Zhang

Lan

Gao

et al. 2019

Advcd Theory and Sims

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“…Other designs of all-dielectric metasurfaces with strong toroidal response for the visible range were proposed in Refs. [138,139].…”

Section: Metamaterials and Metasurfacesmentioning

confidence: 99%

Nonradiating photonics with resonant dielectric nanostructures

et al. 2019

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Nonradiating sources of energy have traditionally been studied in quantum mechanics and astrophysics, while receiving a very little attention in the photonics community. This situation has changed recently due to a number of pioneering theoretical studies and remarkable experimental demonstrations of the exotic states of light in dielectric resonant photonic structures and metasurfaces, with the possibility to localize efficiently the electromagnetic fields of high intensities within small volumes of matter. These recent advances underpin novel concepts in nanophotonics, and provide a promising pathway to overcome the problem of losses usually associated with metals and plasmonic materials for the efficient control of the light-matter interaction at the nanoscale. This review paper provides the general background and several snapshots of the recent results in this young yet prominent research field, focusing on two types of nonradiating states of light that both have been recently at the center of many studies in all-dielectric resonant meta-optics and metasurfaces: optical anapoles and photonic bound states in the continuum. We discuss a brief history of these states in optics, their underlying physics and manifestations, and also emphasize their differences and similarities. We also review some applications of such novel photonic states in both linear and nonlinear optics for the nanoscale field enhancement, a design of novel dielectric structures with high-resonances, nonlinear wave mixing and enhanced harmonic generation, as well as advanced concepts for lasing and optical neural networks. arXiv:1903.04756v1 [physics.optics]

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“…The corresponding quality factors of leaky resonances depend on the degree of the introduced structural asymmetry [20]. The concept of manipulating the transition between the symmetry-protected BICs and leaky resonances was first proposed for plasmonic metasurfaces composed of metallic split-ring resonators [21], and then it was developed for all-dielectric metasurfaces [22][23][24][25][26][27][28][29][30][31]. The recent development in topological photonics has demonstrated a wide class of topologically protected states [32].…”

Section: Introductionmentioning

confidence: 99%

Metasurface Engineering through Bound States in the Continuum

et al. 2019

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Metasurfaces have attracted a lot of attention in recent years due to novel ways they provide for the efficient wavefront control and engineering of the resonant transmission. We discuss an approach allowing effectively control appearance of the sharp Fano resonances in metasurfaces associated with the bound states in the continuum. We demonstrate that by breaking the symmetry transversely, in the direction perpendicular to a metasurface with a complex unit cell, we can control the number, frequency, and type of high-Q resonances originating from bound states in the continuum. As example, we demonstrate experimentally the metasurfaces with magnetic dipole and toroidal dipole responses governed by the physics of multipolar bound states.

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All-Dielectric Resonant Metasurfaces with a Strong Toroidal Response

Cited by 148 publications

References 47 publications

Toroidal Dipole Resonances in All‐Dielectric Oligomer Metasurfaces

Toroidal Dipole Resonances in All‐Dielectric Oligomer Metasurfaces

Nonradiating photonics with resonant dielectric nanostructures

Metasurface Engineering through Bound States in the Continuum

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