Ultrahigh refractive index sensing performance of plasmonic quadrupole resonances in gold nanoparticles

Zehui Yong; Dangyuan Lei; Chi Hang Lam; Yu Wang

doi:10.1186/1556-276X-9-187

Ultrahigh refractive index sensing performance of plasmonic quadrupole resonances in gold nanoparticles

Zehui Yong, Dangyuan Lei, Chi Hang Lam, Yu Wang

Research output: Journal article publication › Journal article › Academic research › peer-review

45 Citations (Scopus)

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.

Original language	English
Article number	187
Pages (from-to)	1-6
Number of pages	6
Journal	Nanoscale Research Letters
Volume	9
Issue number	1
DOIs	https://doi.org/10.1186/1556-276X-9-187
Publication status	Published - 1 Dec 2014

Keywords

Gold nanoparticles
Localized surface plasmon resonance
Refractive index sensing

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

More information

10.1186/1556-276X-9-187

http://hdl.handle.net/10397/29225

Cite this

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title = "Ultrahigh refractive index sensing performance of plasmonic quadrupole resonances in gold nanoparticles",

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.",

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AU - Yong, Zehui

AU - Lei, Dangyuan

AU - Lam, Chi Hang

AU - Wang, Yu

PY - 2014/12/1

Y1 - 2014/12/1

N2 - 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.

AB - 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.

KW - Gold nanoparticles

KW - Localized surface plasmon resonance

KW - Refractive index sensing

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JO - Nanoscale Research Letters

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ER -

Ultrahigh refractive index sensing performance of plasmonic quadrupole resonances in gold nanoparticles

Abstract

Keywords

ASJC Scopus subject areas

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