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Title: Ultrahigh refractive index sensing performance of plasmonic quadrupole resonances in gold nanoparticles
Authors: Yong, Z
Lei, DY 
Lam, CH 
Wang, Y 
Keywords: Localized surface plasmon resonance
Gold nanoparticles
Refractive index sensing
Issue Date: 2014
Publisher: Springer
Source: Nanoscale research letters, 2014, v. 9, 187, p. 1-6 How to cite?
Journal: Nanoscale Research Letters 
Abstract: The refractive index sensing properties of plasmonic resonances in gold nanoparticles (nanorods and nanobipyramids) are investigated through numerical simulations. We find that the quadruple resonance in both nanoparticles shows much higher sensing figure of merit (FOM) than its dipolar counterpart, which is attributed mainly to the reduction in resonance linewidth. More importantly, our results predict that at the same sensing wavelength, the sensing FOM of the quadrupole mode can be significantly boosted from 3.9 for gold nanorods to 7.4 for gold nanobipyramids due to the geometry-dependent resonance linewidth, revealing a useful strategy for optimizing the sensing performance of metal nanoparticles.
ISSN: 1556-276X
DOI: 10.1186/1556-276X-9-187
Rights: © 2014 Yong et al.; licensee Springer. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproductionin any medium, provided the original work is properly credited.
The following publication Yong, Z., Lei, D. Y., Lam, C. H., & Wang, Y. (2014). Ultrahigh refractive index sensing performance of plasmonic quadrupole resonances in gold nanoparticles. Nanoscale Research Letters, 9, 187, 1-6 is available at
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