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Title: Optical properties and plasmonic response of silver-gallium nanostructures

Silver and gallium form an alloy Ag{sub 2}Ga via a room temperature spontaneous self-assembly that exhibits remarkable mechanical and electrical properties suitable for nanoscale measurements. However, whether photon excitation of plasmons in this emerging nanomaterial is retained or not has not been established. Here, we present a thin film formation of Ag{sub 2}Ga via a spreading-reactive process of liquid Ga on an Ag film and a characterization of its dielectric function ϵ(E) = ϵ{sub 1}(E) + iϵ{sub 2}(E) in the photon energy range 1.42 eV ≤ E < 4.2 eV. It is observed that while the plasmon damping increases, near an energy of 2.25 eV, the real part of ϵ exhibits a crossing with respect to that of Ag. Furthermore, the impact of new plasmon supporting materials is discussed and in order to enable further applications in plasmonics, the possibility of photon excitation of surface plasmons in Ag{sub 2}Ga is studied.
Authors:
 [1] ;  [2] ; ;  [3] ;  [4] ;  [1] ;  [5] ;  [5]
  1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6123 (United States)
  2. (France)
  3. Aix-Marseille Université, CNRS, Centrale Marseille, Institut Fresnel, UMR 7249, 13013 Marseille (France)
  4. NaugaNeedles LLC, Louisville, Kentucky 40299 (United States)
  5. (United States)
Publication Date:
OSTI Identifier:
22413084
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 6; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; DIELECTRIC MATERIALS; ELECTRICAL PROPERTIES; EV RANGE; EXCITATION; GALLIUM; INTERMETALLIC COMPOUNDS; NANOSTRUCTURES; OPTICAL PROPERTIES; PERMITTIVITY; PHOTONS; PLASMONS; SILVER; SURFACES; TEMPERATURE RANGE 0273-0400 K; THIN FILMS