Homogeneous metamaterial description of localised spoof plasmonics in spiral geometries
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
It has been recently shown that ultrathin spiral metamaterials can support localized spoof plasmon modes whose resonant wavelength is much larger than the size of the structure. Here, an analytical model is developed to describe the electromagnetic properties of the two-dimensional version of these devices: a perfect conducting wire corrugated by spiral grooves. The emergence of localized spoof plasmons in this geometry is quantitatively investigated. Calculations show that these modes can be engineered through the spiral angle and the number of grooves. The theory also allows us to elucidate the contribution of magnetic and electric localized spoof plasmons to the optical response of these metamaterial devices. Finally, experimental evidence of the existence of these modes in extremely thin textured copper disks is also presented.
Date Issued
2016-09-27
Date Acceptance
2016-09-27
Citation
ACS Photonics, 2016, 3 (10), pp.1768-1775
ISSN
2330-4022
Publisher
American Chemical Society
Start Page
1768
End Page
1775
Journal / Book Title
ACS Photonics
Volume
3
Issue
10
Copyright Statement
© 2016 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Photonics, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acsphotonics.6b00488
Sponsor
The Royal Society
Engineering & Physical Science Research Council (EPSRC)
Grant Number
WM110079
EP/L024926/1
Subjects
Science & Technology
Technology
Physical Sciences
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Optics
Physics, Applied
Physics, Condensed Matter
Science & Technology - Other Topics
Materials Science
Physics
spoof surface plasmons
metamaterials
magnetic resonances
effective medium theory
ENHANCED RAMAN-SCATTERING
SURFACE-PLASMONS
NANOSTRUCTURES
POLARITONS
ABSORPTION
RESONANCES
ULTRATHIN
OPTICS
Publication Status
Published