Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29225
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 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.
URI: http://hdl.handle.net/10397/29225
ISSN: 1556-276X
DOI: 10.1186/1556-276X-9-187
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