Understanding plasmons in nanoscale voids

Cole, Robin M., Baumberg, Jeremy J., Garcia de Abajo, F. J., Mahajan, Sumeet, Abdelsalam, Mamdouh and Bartlett, Philip N. (2007) Understanding plasmons in nanoscale voids. Nano Letters, 7 7: 2094-2100. doi:10.1021/nl0710506


Author Cole, Robin M.
Baumberg, Jeremy J.
Garcia de Abajo, F. J.
Mahajan, Sumeet
Abdelsalam, Mamdouh
Bartlett, Philip N.
Title Understanding plasmons in nanoscale voids
Journal name Nano Letters   Check publisher's open access policy
ISSN 1530-6984
1530-6992
Publication date 2007-07
Sub-type Article (original research)
DOI 10.1021/nl0710506
Volume 7
Issue 7
Start page 2094
End page 2100
Total pages 7
Place of publication Washington, DC, United States
Publisher American Chemical Society
Language eng
Abstract Metallic nanoscale voids (“anti-nanoparticles”) are shown to possess radically different plasmon modes to metal nanoparticles. Comparing new boundary element calculations for the first time with experiment clearly and intuitively identifies plasmon wavefunctions in spherical voids according to their atomic-like symmetries. As the spherical voids are progressively truncated, the degenerate radial modes split in energy, with intense coupling to incident light at specific optimal angles. In contrast to nanoparticles, voids embedded in metal films possess additional rim plasmon modes that selectively couple with void plasmons to produce bonding and antibonding hybridized states with significant field enhancements. These modes, which are verified in experiment, are crucial for the effective use of plasmons in antenna applications such as reproducible surface enhanced Raman scattering.
Keyword Metal
Nanoscale voids
Optimal angles
Nanoparticles
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Mathematics and Physics
 
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