Theoretical Analysis of Hybrid Metal–Dielectric Nanoantennas with Plasmonic Fano Resonance for Optical Sensing

Jingwei Lv; Debao Wang; Chao Liu; Jianxin Wang; Lin Yang; Wei Liu; Qiang Liu; Haiwei Mu; Paul K. Chu

doi:10.3390/coatings12091248

Theoretical Analysis of Hybrid Metal–Dielectric Nanoantennas with Plasmonic Fano Resonance for Optical Sensing

Jingwei Lv, Debao Wang, Chao Liu^*, Jianxin Wang, Lin Yang, Wei Liu, Qiang Liu, Haiwei Mu, Paul K. Chu

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

4 Citations (Scopus)

42 Downloads (CityUHK Scholars)

Abstract

A nanoantenna with Fano response is designed with plasmonic oligomers as a refractive index sensor to enhance surface-enhanced Raman scattering (SERS) in the visible light spectrum. The scattered radiation and field-enhanced interactions of the outer gallium phosphide (GaP) nanoring assembled with an inner heptamer of silver with Fano response are investigated systematically using the finite element method. The characteristics of Fano resonance are found to depend on the size, shape and nature of the materials in the hybrid nanoantenna. The confined electromagnetic field produces a single-point electromagnetic hotspot with up to 159.59 V/m. The sensitivity obtained from the wavelength shift and variation in the scattering cross-section (SCS) shows a maximum value of 550 nm/RIU. The results validate the design concept and demonstrate near-field enhancement, enabling the design of high-performance nanoantennas with enhanced optical sensing and SERS properties.

Original language	English
Article number	1248
Journal	Coatings
Volume	12
Issue number	9
Online published	26 Aug 2022
DOIs	https://doi.org/10.3390/coatings12091248
Publication status	Published - Sept 2022

Research Keywords

Fano
heptamer
nano-antennas
SERS

Publisher's Copyright Statement

This full text is made available under CC-BY 4.0. https://creativecommons.org/licenses/by/4.0/

Access Output

10.3390/coatings12091248

119384429.pdfFinal Published version, 2.1 MBLicence: CC BY

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{0f3633552190412e8856f389ed13e1ed,

title = "Theoretical Analysis of Hybrid Metal–Dielectric Nanoantennas with Plasmonic Fano Resonance for Optical Sensing",

abstract = "A nanoantenna with Fano response is designed with plasmonic oligomers as a refractive index sensor to enhance surface-enhanced Raman scattering (SERS) in the visible light spectrum. The scattered radiation and field-enhanced interactions of the outer gallium phosphide (GaP) nanoring assembled with an inner heptamer of silver with Fano response are investigated systematically using the finite element method. The characteristics of Fano resonance are found to depend on the size, shape and nature of the materials in the hybrid nanoantenna. The confined electromagnetic field produces a single-point electromagnetic hotspot with up to 159.59 V/m. The sensitivity obtained from the wavelength shift and variation in the scattering cross-section (SCS) shows a maximum value of 550 nm/RIU. The results validate the design concept and demonstrate near-field enhancement, enabling the design of high-performance nanoantennas with enhanced optical sensing and SERS properties.",

keywords = "Fano, heptamer, nano-antennas, SERS",

author = "Jingwei Lv and Debao Wang and Chao Liu and Jianxin Wang and Lin Yang and Wei Liu and Qiang Liu and Haiwei Mu and Chu, {Paul K.}",

year = "2022",

month = sep,

doi = "10.3390/coatings12091248",

language = "English",

volume = "12",

number = "9",

}

TY - JOUR

T1 - Theoretical Analysis of Hybrid Metal–Dielectric Nanoantennas with Plasmonic Fano Resonance for Optical Sensing

AU - Lv, Jingwei

AU - Wang, Debao

AU - Liu, Chao

AU - Wang, Jianxin

AU - Yang, Lin

AU - Liu, Wei

AU - Liu, Qiang

AU - Mu, Haiwei

AU - Chu, Paul K.

PY - 2022/9

Y1 - 2022/9

N2 - A nanoantenna with Fano response is designed with plasmonic oligomers as a refractive index sensor to enhance surface-enhanced Raman scattering (SERS) in the visible light spectrum. The scattered radiation and field-enhanced interactions of the outer gallium phosphide (GaP) nanoring assembled with an inner heptamer of silver with Fano response are investigated systematically using the finite element method. The characteristics of Fano resonance are found to depend on the size, shape and nature of the materials in the hybrid nanoantenna. The confined electromagnetic field produces a single-point electromagnetic hotspot with up to 159.59 V/m. The sensitivity obtained from the wavelength shift and variation in the scattering cross-section (SCS) shows a maximum value of 550 nm/RIU. The results validate the design concept and demonstrate near-field enhancement, enabling the design of high-performance nanoantennas with enhanced optical sensing and SERS properties.

AB - A nanoantenna with Fano response is designed with plasmonic oligomers as a refractive index sensor to enhance surface-enhanced Raman scattering (SERS) in the visible light spectrum. The scattered radiation and field-enhanced interactions of the outer gallium phosphide (GaP) nanoring assembled with an inner heptamer of silver with Fano response are investigated systematically using the finite element method. The characteristics of Fano resonance are found to depend on the size, shape and nature of the materials in the hybrid nanoantenna. The confined electromagnetic field produces a single-point electromagnetic hotspot with up to 159.59 V/m. The sensitivity obtained from the wavelength shift and variation in the scattering cross-section (SCS) shows a maximum value of 550 nm/RIU. The results validate the design concept and demonstrate near-field enhancement, enabling the design of high-performance nanoantennas with enhanced optical sensing and SERS properties.

KW - Fano

KW - heptamer

KW - nano-antennas

KW - SERS

UR - http://www.scopus.com/inward/record.url?scp=85138869236&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85138869236&origin=recordpage

U2 - 10.3390/coatings12091248

DO - 10.3390/coatings12091248

M3 - RGC 21 - Publication in refereed journal

SN - 2079-6412

VL - 12

JO - Coatings

JF - Coatings

IS - 9

M1 - 1248

ER -

Theoretical Analysis of Hybrid Metal–Dielectric Nanoantennas with Plasmonic Fano Resonance for Optical Sensing

Abstract

Research Keywords

Publisher's Copyright Statement

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this