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Highly tunable propagating surface plasmons on supported silver nanowires

Wei, Hong; Zhang, Shunping; Tian, Xiaorui and Xu, Hongxing LU (2013) In Proceedings of the National Academy of Sciences 110(12). p.4494-4499
Abstract
Surface plasmons, the quanta of the collective oscillations of free electrons at metal surface, can be easily tuned by changing the surrounding dielectric materials, which is well known for metal nanoparticles and metal surfaces, but less is known for one-dimensional metal nanowires. Here, we find an extremely large tunability of surface plasmons on Ag nanowires with a beat period of the near-field distribution pattern increasing by 90 nm per nanometer of Al2O3 coating, or by 16 mu m per refractive index unit change in the surrounding medium. Such high sensitivity is crucial to directly control the optical signal distribution for various routing and demultiplexing functions in plasmonic circuits and may pave the way to the development of... (More)
Surface plasmons, the quanta of the collective oscillations of free electrons at metal surface, can be easily tuned by changing the surrounding dielectric materials, which is well known for metal nanoparticles and metal surfaces, but less is known for one-dimensional metal nanowires. Here, we find an extremely large tunability of surface plasmons on Ag nanowires with a beat period of the near-field distribution pattern increasing by 90 nm per nanometer of Al2O3 coating, or by 16 mu m per refractive index unit change in the surrounding medium. Such high sensitivity is crucial to directly control the optical signal distribution for various routing and demultiplexing functions in plasmonic circuits and may pave the way to the development of on-chip ultrasensitive biosensing. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
plasmonics, imaging, sensing, quantum dot, modulation
in
Proceedings of the National Academy of Sciences
volume
110
issue
12
pages
4494 - 4499
publisher
National Acad Sciences
external identifiers
  • wos:000317521600028
  • scopus:84875235720
ISSN
1091-6490
DOI
10.1073/pnas.1217931110
language
English
LU publication?
yes
id
19813e41-647f-4484-a136-4f355659e37f (old id 3739231)
date added to LUP
2013-05-22 10:32:05
date last changed
2019-09-22 03:01:58
@article{19813e41-647f-4484-a136-4f355659e37f,
  abstract     = {Surface plasmons, the quanta of the collective oscillations of free electrons at metal surface, can be easily tuned by changing the surrounding dielectric materials, which is well known for metal nanoparticles and metal surfaces, but less is known for one-dimensional metal nanowires. Here, we find an extremely large tunability of surface plasmons on Ag nanowires with a beat period of the near-field distribution pattern increasing by 90 nm per nanometer of Al2O3 coating, or by 16 mu m per refractive index unit change in the surrounding medium. Such high sensitivity is crucial to directly control the optical signal distribution for various routing and demultiplexing functions in plasmonic circuits and may pave the way to the development of on-chip ultrasensitive biosensing.},
  author       = {Wei, Hong and Zhang, Shunping and Tian, Xiaorui and Xu, Hongxing},
  issn         = {1091-6490},
  keyword      = {plasmonics,imaging,sensing,quantum dot,modulation},
  language     = {eng},
  number       = {12},
  pages        = {4494--4499},
  publisher    = {National Acad Sciences},
  series       = {Proceedings of the National Academy of Sciences},
  title        = {Highly tunable propagating surface plasmons on supported silver nanowires},
  url          = {http://dx.doi.org/10.1073/pnas.1217931110},
  volume       = {110},
  year         = {2013},
}