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Title: Anisotropic surroundings effects on photo absorption of partially embedded Au nanospheroids in silica glass substrate

The influence of a directly adjacent or an anisotropic surrounding medium alters the plasmonic properties of a nanoparticle because it provides a mechanism for symmetry breaking of the scattering. Given the success of ion irradiation induced embedment of rigid metallic nanospheroids into amorphous substrate, it is possible to examine the effect of the silica glass substrate on the plasmonic properties of these embedded nanospheroids. In this work presented here, discrete dipole approximation (DDA) calculations for the Au nanospheroids’ optical properties were performed based on 3–dimensional (3D) configuration extracted from planar SEM micrographs and cross–sectional TEM micrographs of the Au nanospheroids partially embedded in the silica glass, and the well–matched simulations with respect to the experimental measurements could demonstrate the dielectric constant at the near surface of silica glass decreased after Ar–ion irradiation.
Authors:
; ;  [1] ; ;  [2]
  1. Center for Advanced Research of Energy and Materials, Faculty of Engineering, Hokkaido University, Sapporo, Hokkaido 060–8628 (Japan)
  2. Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido 060–8628 (Japan)
Publication Date:
OSTI Identifier:
22454447
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 5; Journal Issue: 2; Other Information: (c) 2015 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION; ANISOTROPY; DIPOLES; GLASS; IONS; IRRADIATION; OPTICAL PROPERTIES; PERMITTIVITY; SCANNING ELECTRON MICROSCOPY; SCATTERING; SILICA; SIMULATION; SUBSTRATES; SURFACES; TRANSMISSION ELECTRON MICROSCOPY