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Title: Multiple Fano interferences in a plasmonic metamolecule consisting of asymmetric metallic nanodimers

We theoretically explore signatures of plasmonic Fano interferences in a subwavelength plasmonic metamolecule consisting of closely packed asymmetric gold nanodimers, which lead to the possibility of generating multiple Fano resonances in the scattering spectrum. This spectral feature is attributed to the interference between bright and dark plasmonic modes sustained by the constituent nanodimers. The excited Fano dips are highly sensitive in both wavelength and amplitude to geometry and background dielectric medium. The tunability of induced Fano resonances associated with enhanced electric fields from the visible to infrared region provides promising applications, particularly in refractive index sensing, light-trapping, and photon up-converting.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Faculty of Science and Technology, Hoa Sen University, Ho Chi Minh (Viet Nam)
  2. (United States)
  3. Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 77812 (United States)
  4. Department of Electrical Engineering, University of Minnesota, Duluth, Minnesota 55812 (United States)
Publication Date:
OSTI Identifier:
22412811
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ASYMMETRY; DIELECTRIC MATERIALS; DIMERS; ELECTRIC FIELDS; GOLD; INTERFERENCE; NANOSTRUCTURES; PHOTONS; PLASMONS; REFRACTIVE INDEX; RESONANCE; SCATTERING; TRAPPING; VISIBLE RADIATION