Journal ArticleDOI
Observation of Fano resonance and classical analog of electromagnetically induced transparency in toroidal metamaterials
TLDR
In this article, a three-dimensionsal toroidal metamaterial where two different toroidal dipoles along orthogonal directions have been observed has been experimentally and numerically demonstrated, where the intriguing properties of the toroidal resonances may open up avenues for applications in toroidal moments generator, sensing and slow light devices.Abstract:
Toroidal multipoles have recently been explored in various scientific communities, ranging from atomic and molecular physics, electrodynamics, and solid-state physics to biology. Here we experimentally and numerically demonstrate a three-dimensionsal toroidal metamaterial where two different toroidal dipoles along orthogonal directions have been observed. The chosen toroidal metamaterial also simultaneously supports Fano resonance and the classical analog of electromagnetically induced transparency (EIT) phenomena in the transmission spectra that originate from the electric–toroidal dipole and electric–magnetic dipole destructive interference. The intriguing properties of the toroidal resonances may open up avenues for applications in toroidal moments generator, sensing and slow-light devices.read more
Citations
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Sensing with toroidal metamaterial
TL;DR: In this article, a two-dimensional terahertz metamaterial was demonstrated with toroidal resonance in which a pair of mirrored asymmetric Fano resonators possesses anti-aligned magnetic moments at an electromagnetic resonance that gives rise to a toroidal dipole.
Journal ArticleDOI
Theory and applications of toroidal moments in electrodynamics: their emergence, characteristics, and technological relevance
TL;DR: In this article, the authors discuss the fundamental and practical aspects of toroidal multipolar moments in electrodynamics, from its emergence in the expansion set and the electromagnetic field associated with it, the unique characteristics of their interaction with external radiations and other moments, to recent attempts to realize pronounced toroidal resonances in smart configurations of meta-molecules.
Journal ArticleDOI
Simulation of dynamically tunable and switchable electromagnetically induced transparency analogue based on metal-graphene hybrid metamaterial
TL;DR: In this article, a planar terahertz electromagnetically induced transparency-like (EIT-like) metamaterial, comprising an outer circular ring resonator (CRS) made by graphene, an inner vertical two-gap circular split ring resonators (VSRR) and a smaller horizontal two-gaussive circular split rings resonator(HSRR), is proposed.
Journal ArticleDOI
Study of the interaction between graphene and planar terahertz metamaterial with toroidal dipolar resonance.
Xu Chen,Wenhui Fan +1 more
TL;DR: The interaction of the toroidal dipolar resonance with monolayer graphene further highlights the ultrasensitive sensing characteristic of the planar metamaterial, which can be utilized for other graphene-like two-dimensional materials.
Journal ArticleDOI
Anapole Mode Sustaining Silicon Metamaterials in Visible Spectral Range
Abstract: 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.
References
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Journal ArticleDOI
Measurement of Parity Nonconservation and an Anapole Moment in Cesium
C. S. Wood,S. C. Bennett,Donghyun Cho,B. P. Masterson,J. L. Roberts,Carol E. Tanner,Carl E. Wieman +6 more
TL;DR: The amplitude of the parity-nonconserving transition between the 6S and 7S states of cesium was precisely measured with the use of a spin-polarized atomic beam, providing an improved test of the standard model at low energy, including a value for the S parameter of −1.3(3)exp (11)theory.
Journal ArticleDOI
Structures of the Common Cyclodextrins and Their Larger Analogues-Beyond the Doughnut.
Wolfram Saenger,Joël Jacob,Katrin Gessler,Thomas Steiner,Daniel Hoffmann,Haruyo Sanbe,Kyoko Koizumi,Steven M. Smith,Takeshi Takaha +8 more
TL;DR: If the amylose fraction of starch is degraded by glucosyltransferases, one or several turns of theAmylose helix are hydrolyzed off and their ends are joined together, thereby producing cyclic oligosaccharides called cyclodextrins (CDs) or cycloamyloses (CAs).
Journal ArticleDOI
Toroidal Dipolar Response in a Metamaterial
TL;DR: The observation of a resonant electromagnetic response in an artificially engineered medium, or metamaterial, that cannot be attributed to magnetic or charge multipoles and can only be explained by the existence of a toroidal dipole is reported.
Journal ArticleDOI
Structure of the bacteriophage φ29 DNA packaging motor
Alan A. Simpson,Yizhi Jane Tao,Yizhi Jane Tao,Petr G. Leiman,Mohammed O. Badasso,Yongning He,Paul J. Jardine,Norman H. Olson,Marc C. Morais,Shelley Grimes,Dwight L. Anderson,Timothy S. Baker,Michael G. Rossmann +12 more
TL;DR: In this article, the structure of the head-tail connector of the Bacillus subtilis bacteriophage phi29 was determined by means of X-ray crystallography, and the connector was fitted into the electron densities of the prohead and of the partially packaged prohead.
Journal ArticleDOI
Toroid moments in electrodynamics and solid-state physics
V.M. Dubovik,V.V. Tugushev +1 more
TL;DR: In this article, the role of toroid moments and average 2n-power radii in the structure of multipole expansions in the framework of Maxwell-Lorentz electrodynamics is explained.