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Controlling surface plasmon interference in branched silver nanowire structures

Wei, Hong and Xu, Hongxing LU (2012) In Nanoscale 4(22). p.7149-7154
Abstract
Using quantum dot fluorescence imaging, we investigated the interference of surface plasmon beams in branched silver nanowire structures. Depending on the phases and polarizations of the incident light, interferences of plasmon beams modulate the plasmon propagation in the branched structures and the output light intensity in the distal ends. The interference visibility is strongly dependent on the incident polarization at the main wire terminal, and the mechanism is revealed by quantum dot fluorescence imaging of the near field distribution of propagating plasmons. The near field distribution pattern resulting from the beating of different plasmon modes plays a critical role in the plasmon interference. The overlap of the antinode in the... (More)
Using quantum dot fluorescence imaging, we investigated the interference of surface plasmon beams in branched silver nanowire structures. Depending on the phases and polarizations of the incident light, interferences of plasmon beams modulate the plasmon propagation in the branched structures and the output light intensity in the distal ends. The interference visibility is strongly dependent on the incident polarization at the main wire terminal, and the mechanism is revealed by quantum dot fluorescence imaging of the near field distribution of propagating plasmons. The near field distribution pattern resulting from the beating of different plasmon modes plays a critical role in the plasmon interference. The overlap of the antinode in the near field pattern with the connection junction in the nanowire structure is required for a large interference visibility, since the overlap makes the electric field intensity difference of the two plasmon beams smaller. It is found that the plasmon interference is strongly dependent on the polarization of the excitation light at the main wire terminal, but weakly dependent on the polarization at the branch wire terminal. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nanoscale
volume
4
issue
22
pages
7149 - 7154
publisher
Royal Society of Chemistry
external identifiers
  • wos:000310978100033
  • scopus:84875798789
ISSN
2040-3372
DOI
10.1039/c2nr31551c
language
English
LU publication?
yes
id
a7f2388a-8537-4142-ab24-51362ee6321e (old id 3256211)
date added to LUP
2012-12-27 09:49:16
date last changed
2017-06-11 03:22:55
@article{a7f2388a-8537-4142-ab24-51362ee6321e,
  abstract     = {Using quantum dot fluorescence imaging, we investigated the interference of surface plasmon beams in branched silver nanowire structures. Depending on the phases and polarizations of the incident light, interferences of plasmon beams modulate the plasmon propagation in the branched structures and the output light intensity in the distal ends. The interference visibility is strongly dependent on the incident polarization at the main wire terminal, and the mechanism is revealed by quantum dot fluorescence imaging of the near field distribution of propagating plasmons. The near field distribution pattern resulting from the beating of different plasmon modes plays a critical role in the plasmon interference. The overlap of the antinode in the near field pattern with the connection junction in the nanowire structure is required for a large interference visibility, since the overlap makes the electric field intensity difference of the two plasmon beams smaller. It is found that the plasmon interference is strongly dependent on the polarization of the excitation light at the main wire terminal, but weakly dependent on the polarization at the branch wire terminal.},
  author       = {Wei, Hong and Xu, Hongxing},
  issn         = {2040-3372},
  language     = {eng},
  number       = {22},
  pages        = {7149--7154},
  publisher    = {Royal Society of Chemistry},
  series       = {Nanoscale},
  title        = {Controlling surface plasmon interference in branched silver nanowire structures},
  url          = {http://dx.doi.org/10.1039/c2nr31551c},
  volume       = {4},
  year         = {2012},
}