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This content will become publicly available on February 15, 2019

Title: Polarization- and wavelength-resolved near-field imaging of complex plasmonic modes in Archimedean nanospirals

Asymmetric nanophotonic structures enable a wide range of opportunities in optical nanotechnology because they support efficient optical nonlinearities mediated by multiple plasmon resonances over a broad spectral range. The Archimedean nanospiral is a canonical example of a chiral plasmonic structure because it supports even-order nonlinearities that are not generally accessible in locally symmetric geometries. However, the complex spiral response makes nanoscale experimental characterization of the plasmonic near-field structure highly desirable. As a result, we employ high-efficiency, high-spatial-resolution cathodoluminescence imaging in a scanning transmission electron microscope to describe the spatial, spectral, and polarization response of plasmon modes in the nanospiral geometry.
ORCiD logo [1] ;  [2] ; ORCiD logo [3] ; ORCiD logo [1] ; ORCiD logo [1] ;  [4] ; ORCiD logo [1] ;  [2]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. Vanderbilt Univ., Nashville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of North Carolina, Chapel Hill, NC (United States)
  4. Vanderbilt Univ., Nashville, TN (United States)
Publication Date:
Grant/Contract Number:
AC05-00OR22725; FG02-01ER45916; FG02-09ER4655
Accepted Manuscript
Journal Name:
Optics Letters
Additional Journal Information:
Journal Volume: 43; Journal Issue: 4; Journal ID: ISSN 0146-9592
Optical Society of America (OSA)
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
Country of Publication:
United States
36 MATERIALS SCIENCE; Surface plasmons; Cathodoluminescence; Subwavelength structures, nano-structures; Polarization-selective devices
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1420366