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Updated: Feb 15, 2026

Fabricating Metamaterials Using the Fiber Drawing Method

Fabricating Metamaterials Using the Fiber Drawing Method

Published on: October 18, 2012

Optical Anapole Metamaterial.

Pin Chieh Wu¹, Chun Yen Liao², Vassili Savinov³

¹Research Center for Applied Sciences, Academia Sinica , Taipei 11529, Taiwan.

|January 30, 2018

Summary

This summary is machine-generated.

Researchers demonstrated a plasmonic metamaterial exhibiting toroidal dipole and anapole behavior in the optical spectrum. This finding shows their significant role in light absorption and dispersion in materials.

Keywords:

anapole mode magnetic dipole plasmonic metamaterial split-ring resonator toroidal dipole

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Area of Science:

* Electromagnetism
* Metamaterials
* Plasmonics

Background:

* Toroidal dipoles are localized electromagnetic excitations distinct from electric and magnetic dipoles.
* Anapoles are nonradiating configurations formed by the interference of toroidal and electric dipoles.
* Toroidal dipole interactions with electromagnetic waves have been observed in artificial media across various frequencies.

Purpose of the Study:

* To demonstrate a quasi-planar plasmonic metamaterial exhibiting toroidal dipole and anapole behavior.
* To investigate these phenomena in the optical part of the spectrum.
* To experimentally prove the contributions of toroidal and anapole modes to material properties.

Main Methods:

* Fabricated a quasi-planar plasmonic metamaterial using a combination of dumbbell aperture and vertical split-ring resonator.
* Excited the metamaterial with a normally incident electromagnetic wave in the optical spectrum.
* Analyzed the resulting transverse toroidal moment and resonant anapole behavior.

Main Results:

* The plasmonic metamaterial exhibited transverse toroidal moment and resonant anapole behavior.
* These phenomena were observed upon excitation with normally incident electromagnetic waves in the optical spectrum.
* Toroidal and anapole modes were shown to significantly contribute to absorption and dispersion.

Conclusions:

* Toroidal modes and anapole modes can be experimentally realized in plasmonic metamaterials in the optical spectrum.
* These modes offer distinct physical contributions to the optical properties of materials.
* The study validates the significance of toroidal and anapole phenomena in optical applications.