Please use this identifier to cite or link to this item: https://doi.org/10.1021/nl3003683
Title: Subgroup decomposition of plasmonic resonances in hybrid oligomers: Modeling the resonance lineshape
Authors: Rahmani, M.
Lei, D.Y.
Giannini, V.
Lukiyanchuk, B.
Ranjbar, M.
Liew, T.Y.F. 
Hong, M. 
Maier, S.A.
Keywords: Fano resonances
plasmonic oligomers
subgroup decomposition
Subwavelength nanostructures
surface plasmons
Issue Date: 11-Apr-2012
Source: Rahmani, M., Lei, D.Y., Giannini, V., Lukiyanchuk, B., Ranjbar, M., Liew, T.Y.F., Hong, M., Maier, S.A. (2012-04-11). Subgroup decomposition of plasmonic resonances in hybrid oligomers: Modeling the resonance lineshape. Nano Letters 12 (4) : 2101-2106. ScholarBank@NUS Repository. https://doi.org/10.1021/nl3003683
Abstract: Plasmonic resonances with a Fano lineshape observed in metallic nanoclusters often arise from the destructive interference between a dark, subradiant mode and a bright, super-radiant one. A flexible control over the Fano profile characterized by its linewidth and spectral contrast is crucial for many potential applications such as slowing light and biosensing. In this work, we show how one can easily but significantly tailor the overall spectral profile in plasmonic nanocluster systems, for example, quadrumers and pentamers, by selectively altering the particle shape without a need to change the particle size, interparticle distance, or the number of elements of the oligomers. This is achieved through decomposing the whole spectrum into two separate contributions from subgroups, which are efficiently excited at their spectral peak positions. We further show that different strengths of interference between the two subgroups must be considered for a full understanding of the resulting spectral lineshape. In some cases, each subgroup is separately active in distinct frequency windows with only small overlap, leading to a simple convolution of the subspectra. Variation in particle shape of either subgroup results in the tuning of the overall spectral lineshape, which opens a novel pathway for shaping the plasmonic response in small nanoclusters. © 2012 American Chemical Society.
Source Title: Nano Letters
URI: http://scholarbank.nus.edu.sg/handle/10635/57549
ISSN: 15306984
DOI: 10.1021/nl3003683
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

100
checked on Dec 13, 2017

WEB OF SCIENCETM
Citations

95
checked on Dec 13, 2017

Page view(s)

33
checked on Dec 9, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.