Optical magnetism in planar metamaterial heterostructures

Papadakis, Georgia T.; Fleischman, Dagny; Davoyan, Artur R.; Yeh, Pochi; Atwater, Harry A.

doi:10.1038/s41467-017-02589-8

Cited by 68 publications

(46 citation statements)

References 70 publications

(167 reference statements)

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“…The latter fields, abbreviated as DC NFs, are observed when the electric or magnetic dipole‐carrying oscillations (such, for example, as surface plasmons and magnons) take place. Notably, in accordance with Mie theory one can observe EM NFs with magnetic responses originated from small nonmagnetic dielectric resonators, both in microwaves and optics . In a case of DC NFs, strong coupling of EM waves with electric or magnetic dipole‐carrying excitations, called polaritons, occur .…”

Section: Introductionsupporting

confidence: 60%

“…Notably, in accordance with Mie theory one can observe EM NFs with magnetic responses originated from small nonmagnetic dielectric resonators, both in microwaves [45] and optics. [46][47][48] In a case of DC NFs, strong coupling of EM waves with electric or magnetic dipole-carrying excitations, called polaritons, occur. [42,49] There is the avoided-crossing coupling between the photon and the dipolar oscillation.…”

Section: Introductionmentioning

confidence: 99%

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Electrodynamics of Magnetoelectric Media and Magnetoelectric Fields

Kamenetskii

2020

Annalen der Physik

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The relationship between magnetoelectricity and electromagnetism is a subject of a strong interest and numerous discussions in microwave and optical wave physics and material sciences. The definition of the energy and momentum of the electromagnetic (EM) field in a magnetoelectric (ME) medium is not a trivial problem. The question of whether electromagnetism and magnetoelectricity can coexist without an extension of Maxwell's theory arises when the effects of EM energy propagation are studied and the group velocity of the waves in an ME medium is considered. The energy balance equation reveals unusual topological structure of fields in ME materials. Together with certain constraints on the constitutive parameters of a medium, definite constraints on the local field structure should be imposed. Analyzing the EM phenomena inside an ME material, the question “what kind of the near fields arising from a sample of such a material can be measured?” should be answered. The visualization of the ME states requires an experimental technique that is based on an effective coupling to the violation of spatial as well as temporal inversion symmetry. To observe the ME energy in a subwavelength region, it is necessary to assume the existence of first‐principle near fields—the ME fields. These are non‐Maxwellian near fields with specific properties of violation of spatial and temporal inversion symmetry. A particular interest to the ME fields arises in studies of metamaterials with “artificial‐atoms” ME elements.

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Section: Introductionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Electrodynamics of Magnetoelectric Media and Magnetoelectric Fields

Kamenetskii

2020

Annalen der Physik

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“…Such a configuration can exhibit a respective mu-near-zero effect. A variety of structures, e.g., nanorings, that exhibit a mu-near-zero effect are studied in [33].…”

Section: 1mentioning

confidence: 99%

Homogenization of plasmonic crystals: seeking the epsilon-near-zero effect

et al. 2019

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By using an asymptotic analysis and numerical simulations, we derive and investigate a system of homogenized Maxwell's equations for conducting material sheets that are periodically arranged and embedded in a heterogeneous and anisotropic dielectric host. This structure is motivated by the need to design plasmonic crystals that enable the propagation of electromagnetic waves with no phase delay (epsilon-near-zero effect). Our microscopic model incorporates the surface conductivity of the two-dimensional (2D) material of each sheet and a corresponding line charge density through a line conductivity along possible edges of the sheets. Our analysis generalizes averaging principles inherent in previous Bloch-wave approaches. We investigate physical implications of our findings. In particular, we emphasize the role of the vector-valued corrector field, which expresses microscopic modes of surface waves on the 2D material. We demonstrate how our homogenization procedure may set the foundation for computational investigations of: effective optical responses of reasonably general geometries, and complicated design problems in the plasmonics of 2D materials.

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“…In particular, the s-polarized scattering spectrum (olive symbols and line in Figure 4b) shows three scattering peaks at 525, 653, and 965 nm, respectively. Referring to the corresponding calculated spectrum (olive line) presented in Figure 1a, we can attribute these scattering peaks to modes (4), (5), and (6) in sequence. While both modes (4) and (5) have been revealed in our previous studies, to our best knowledge it is the first experimental observation of the magnetic resonance mode (6) in a nanosphere DoFN.…”

Section: Polarization-resolved Dark-field Scattering Spectroscopymentioning

confidence: 78%

Plasmon‐Induced Optical Magnetism in an Ultrathin Metal Nanosphere‐Based Dimer‐on‐Film Nanocavity

Meng

Zhang

Lei

et al. 2020

Laser & Photonics Reviews

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Recently, plasmon‐induced optical magnetism has attracted much research interest in nanophotonics and plasmonics due to intriguing applications in optical metamaterials, and ultrasensitive plasmonic nano‐metrology, among many others. Here, a strong in‐plane magnetic dipolar resonance in an ultrathin plasmonic nanocavity consisting of a silica‐coated gold nanosphere dimer coupled to a gold thin film is observed experimentally and explained theoretically. Multipolar expansion and numerical simulation disclose that such magnetic resonance is induced by a displacement current loop circulating around a nanometer thick triangular region in the cavity. The spectral response and radiation polarization of the magnetic mode are “visualized” by using a polarization‐resolved dark‐field imaging system at the single‐particle level. The resonance responses of this magnetic mode highly depends on cavity gap thickness, nanosphere dimension, and the incident angle, allowing straightforward resonance tuning from the visible to near‐infrared region and thus opening up a new avenue for magnetic resonance‐enhanced nonlinear optics and chiral optics.

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Optical magnetism in planar metamaterial heterostructures

Cited by 68 publications

References 70 publications

Electrodynamics of Magnetoelectric Media and Magnetoelectric Fields

Electrodynamics of Magnetoelectric Media and Magnetoelectric Fields

Homogenization of plasmonic crystals: seeking the epsilon-near-zero effect

Plasmon‐Induced Optical Magnetism in an Ultrathin Metal Nanosphere‐Based Dimer‐on‐Film Nanocavity

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