Polarization- and wavelength-resolved near-field imaging of complex plasmonic modes in Archimedean nanospirals
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Vanderbilt Univ., Nashville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of North Carolina, Chapel Hill, NC (United States)
- Vanderbilt Univ., Nashville, TN (United States)
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.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Vanderbilt Univ., Nashville, TN (United States)
- Sponsoring Organization:
- USDOE; USDOE Office of Science (SC)
- Grant/Contract Number:
- AC05-00OR22725; FG02-01ER45916; FG02-09ER4655; FG02-09ER46554
- OSTI ID:
- 1435311
- Alternate ID(s):
- OSTI ID: 1420366; OSTI ID: 1597874
- Journal Information:
- Optics Letters, Vol. 43, Issue 4; ISSN 0146-9592
- Publisher:
- Optical Society of America (OSA)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Spatially and spectrally resolved orbital angular momentum interactions in plasmonic vortex generators
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journal | March 2019 |
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