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Title: Three-dimensional cut wire pair behavior and controllable bianisotropic response in vertically oriented meta-atoms

This paper investigates three-dimensional cut wire pair (CWP) behavior in vertically oriented meta-atoms. We first analyze CWP metamaterial inclusions using full-wave electromagnetic simulations. The scattering behavior of the vertical CWP differs substantially from that of the planar version of the same structure. In particular, we show that the vertical CWP supports a magnetic resonance that is solely excited by the incident magnetic field. This is in stark contrast to the bianisotropic resonant excitation of in-plane CWPs. We further show that this CWP behavior can occur in other vertical metamaterial resonators, such as back-to-back linear dipoles and back-to-back split ring resonators (SRRs), due to the strong coupling between the closely spaced metallic elements in the back-to-back configuration. In the case of SRRs, the vertical CWP mode (unexplored in previous literature) can be excited with a magnetic field that is parallel to both SRR loops, and exists in addition to the familiar fundamental resonances of the individual SRRs. In order to fully describe the scattering behavior from such dense arrays of three-dimensional structures, coupling effects between the close-packed inclusions must be included. Here, the new flexibility afforded by using vertical resonators allows us to controllably create purely electric inclusions, purely magnetic inclusions,more » as well as bianisotropic inclusions, and vastly increases the degrees of freedom for the design of metafilms.« less
Authors:
ORCiD logo [1] ;  [2] ;  [1] ;  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  2. Air Force Research Lab., Wright-Patterson AFB, OH (United States)
Publication Date:
Report Number(s):
SAND-2017-13519J
Journal ID: ISSN 1094-4087; OPEXFF; 659514
Grant/Contract Number:
AC04-94AL85000
Type:
Published Article
Journal Name:
Optics Express
Additional Journal Information:
Journal Volume: 25; Journal Issue: 25; Journal ID: ISSN 1094-4087
Publisher:
Optical Society of America (OSA)
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Metamaterials; Nanomaterials
OSTI Identifier:
1412004
Alternate Identifier(s):
OSTI ID: 1421651