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Title: Optical properties of nanowire dimers with a spatially nonlocal dielectric function.

Abstract

We study the optical spectra and electromagnetic field enhancements around cylindrical and triangular Ag nanowire dimers, allowing for a spatially nonlocal dielectric function that partially accounts for quantum mechanical effects. For the triangular structures, we pay particular attention to how these properties depend on the sharpness of the nanowire's tips. We demonstrate that significant differences exist from classical electrodynamics that employs a more common, spatially local dielectric function. These differences are shown to arise from the optical excitation of volume plasmons inside of the structures, analogous to one-particle quantum mechanical states, which lead to complex and striking patterns of material polarization. These results are important for further understanding the optical properties of structures at the nanoscale and have implications for numerous physical processes, such as surface-enhanced Raman scattering.

Authors:
; ;  [1]
  1. Center for Nanoscale Materials
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1018498
Report Number(s):
ANL/CNM/JA-67635
Journal ID: 1530-6984; TRN: US201114%%29
DOE Contract Number:  
DE-AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Nano Lett.
Additional Journal Information:
Journal Volume: 10; Journal Issue: 9 ; Sep. 2010
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; DIELECTRIC MATERIALS; DIMERS; ELECTRODYNAMICS; ELECTROMAGNETIC FIELDS; EXCITATION; MECHANICAL PROPERTIES; OPTICAL PROPERTIES; PLASMONS; POLARIZATION; SCATTERING; SPECTRA

Citation Formats

McMahon, J M, Gray, S K, Schatz, G C, CSE), and Northwestern Univ.). Optical properties of nanowire dimers with a spatially nonlocal dielectric function.. United States: N. p., 2010. Web. doi:10.1021/nl101606j.
McMahon, J M, Gray, S K, Schatz, G C, CSE), & Northwestern Univ.). Optical properties of nanowire dimers with a spatially nonlocal dielectric function.. United States. https://doi.org/10.1021/nl101606j
McMahon, J M, Gray, S K, Schatz, G C, CSE), and Northwestern Univ.). 2010. "Optical properties of nanowire dimers with a spatially nonlocal dielectric function.". United States. https://doi.org/10.1021/nl101606j.
@article{osti_1018498,
title = {Optical properties of nanowire dimers with a spatially nonlocal dielectric function.},
author = {McMahon, J M and Gray, S K and Schatz, G C and CSE) and Northwestern Univ.)},
abstractNote = {We study the optical spectra and electromagnetic field enhancements around cylindrical and triangular Ag nanowire dimers, allowing for a spatially nonlocal dielectric function that partially accounts for quantum mechanical effects. For the triangular structures, we pay particular attention to how these properties depend on the sharpness of the nanowire's tips. We demonstrate that significant differences exist from classical electrodynamics that employs a more common, spatially local dielectric function. These differences are shown to arise from the optical excitation of volume plasmons inside of the structures, analogous to one-particle quantum mechanical states, which lead to complex and striking patterns of material polarization. These results are important for further understanding the optical properties of structures at the nanoscale and have implications for numerous physical processes, such as surface-enhanced Raman scattering.},
doi = {10.1021/nl101606j},
url = {https://www.osti.gov/biblio/1018498}, journal = {Nano Lett.},
number = 9 ; Sep. 2010,
volume = 10,
place = {United States},
year = {2010},
month = {9}
}