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Title: Efficient forward second-harmonic generation from planar archimedean nanospirals

Here, the enhanced electric field at plasmonic resonances in nanoscale antennas can lead to efficient harmonic generation, especially when the plasmonic geometry is asymmetric on either inter-particle or intra-particle levels. The planar Archimedean nanospiral offers a unique geometrical asymmetry for second-harmonic generation (SHG) because the SHG results neither from arranging centrosymmetric nanoparticles in asymmetric groupings, nor from non-centrosymmetric nanoparticles that retain a local axis of symmetry. Here, we report forward SHG from planar arrays of Archimedean nanospirals using 15 fs pulses from a Ti:sapphire oscillator tuned to 800 nm wavelength.
Authors:
 [1] ;  [1] ;  [2] ;  [1] ;  [3] ;  [3] ;  [1]
  1. Vanderbilt Univ., Nashville, TN (United States)
  2. Vanderbilt Univ., Nashville, TN (United States); Cornell Univ., Ithaca, NY (United States)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
OSTI Identifier:
1203862
Report Number(s):
PNNL-SA-107834
Journal ID: ISSN 2192-8606; KC0301020
Grant/Contract Number:
AC05-76RL01830
Type:
Accepted Manuscript
Journal Name:
Nanophotonics
Additional Journal Information:
Journal Volume: 4; Journal Issue: 1; Journal ID: ISSN 2192-8606
Publisher:
De Gruyter
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; nonlinear plasmonics; asymmetric nanoparticles; polarization conversion; metasurfaces; near-field enhancement; Archimedean nanospirals