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Optimizing Substrate-Mediated Plasmon Coupling toward High-Performance Plasmonic Nanowire Waveguides

Zhang, Shunping and Xu, Hongxing LU (2012) In ACS Nano 6(9). p.8128-8135
Abstract
Seeking better plasmonic waveguides is of critical importance for minimizing photonic circuits into the nanometer scale. We have made a theoretical study of the properties of surface plasmon polaritons in a metallic nanowire over substrate (NWOS) configuration. The dielectric substrate breaks the symmetry of the system and mediates the coupling of different primary wire plasmons. The lowest order hybridized mode can be used for subwavelength plasmonic waveguiding for NWOS with thin wire, for a low-permittivity substrate, and in the shorter wavelength region. For NWOS with a high-permittivity substrate, leaky radiation into the substrate raises the propagation losses so that the propagation distance is shorter in the longer wavelength... (More)
Seeking better plasmonic waveguides is of critical importance for minimizing photonic circuits into the nanometer scale. We have made a theoretical study of the properties of surface plasmon polaritons in a metallic nanowire over substrate (NWOS) configuration. The dielectric substrate breaks the symmetry of the system and mediates the coupling of different primary wire plasmons. The lowest order hybridized mode can be used for subwavelength plasmonic waveguiding for NWOS with thin wire, for a low-permittivity substrate, and in the shorter wavelength region. For NWOS with a high-permittivity substrate, leaky radiation into the substrate raises the propagation losses so that the propagation distance is shorter in the longer wavelength region. By simply adding a high-permittivity layer onto the low-permittivity substrate, we show that leaky radiation can be blocked and high-performance plasmonic waveguiding can be extended to the near-infrared region. Importantly, the NWOS configuration is compatible with current silicon technologies and can be designed into various deep subwavelength active devices such as electro-optical or all-optical modulators. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
SPPs, nanowire, plasmonic waveguides, substrate, silicon compatible
in
ACS Nano
volume
6
issue
9
pages
8128 - 8135
publisher
The American Chemical Society
external identifiers
  • wos:000309040600065
  • scopus:84866720740
ISSN
1936-086X
DOI
10.1021/nn302755a
language
English
LU publication?
yes
id
9b17c585-108d-4e29-9780-d08d1b8e6cf1 (old id 3187983)
date added to LUP
2012-12-06 12:02:36
date last changed
2017-11-19 03:23:17
@article{9b17c585-108d-4e29-9780-d08d1b8e6cf1,
  abstract     = {Seeking better plasmonic waveguides is of critical importance for minimizing photonic circuits into the nanometer scale. We have made a theoretical study of the properties of surface plasmon polaritons in a metallic nanowire over substrate (NWOS) configuration. The dielectric substrate breaks the symmetry of the system and mediates the coupling of different primary wire plasmons. The lowest order hybridized mode can be used for subwavelength plasmonic waveguiding for NWOS with thin wire, for a low-permittivity substrate, and in the shorter wavelength region. For NWOS with a high-permittivity substrate, leaky radiation into the substrate raises the propagation losses so that the propagation distance is shorter in the longer wavelength region. By simply adding a high-permittivity layer onto the low-permittivity substrate, we show that leaky radiation can be blocked and high-performance plasmonic waveguiding can be extended to the near-infrared region. Importantly, the NWOS configuration is compatible with current silicon technologies and can be designed into various deep subwavelength active devices such as electro-optical or all-optical modulators.},
  author       = {Zhang, Shunping and Xu, Hongxing},
  issn         = {1936-086X},
  keyword      = {SPPs,nanowire,plasmonic waveguides,substrate,silicon compatible},
  language     = {eng},
  number       = {9},
  pages        = {8128--8135},
  publisher    = {The American Chemical Society},
  series       = {ACS Nano},
  title        = {Optimizing Substrate-Mediated Plasmon Coupling toward High-Performance Plasmonic Nanowire Waveguides},
  url          = {http://dx.doi.org/10.1021/nn302755a},
  volume       = {6},
  year         = {2012},
}