Design of optical anapole modes of all-dielectric nanoantennas for SERS applications

Debao WANG; Jingwei LV; Jianxin WANG; Yanru REN; Ying YU; Wei LI; Paul K. CHU; Chao LIU

doi:10.1364/AO.494145

Design of optical anapole modes of all-dielectric nanoantennas for SERS applications

Debao WANG, Jingwei LV^*, Jianxin WANG, Yanru REN, Ying YU, Wei LI, Paul K. CHU, Chao LIU

^*Corresponding author for this work

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

2 Citations (Scopus)

Abstract

To obtain large electric field enhancement while mitigating material losses, an all-dielectric nanoantenna composed of a heptamer and nanocubes is designed and analyzed. A numerical simulation by the finite element method reveals that the nanoantenna achieves the optical electric anapole modes, thereby significantly enhancing the coupling between different dielectrics to further improve the near-field enhancement and spontaneous radiation. Field enhancement factors |E/E₀|² of 3,563 and 5,395 (AM1 and AM2) and a Purcell factor of 3,872 are observed in the wavelength range between 350 and 800 nm. This nanoantenna has promising potential in applications involving surface-enhanced Raman scattering and nonlinearities due to its low cost and excellent compatibility. Journal © 2023 Optica Publishing Group.

Original language	English
Pages (from-to)	5538-5546
Journal	Applied Optics
Volume	62
Issue number	20
Online published	7 Jul 2023
DOIs	https://doi.org/10.1364/AO.494145
Publication status	Published - 10 Jul 2023

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title = "Design of optical anapole modes of all-dielectric nanoantennas for SERS applications",

abstract = "To obtain large electric field enhancement while mitigating material losses, an all-dielectric nanoantenna composed of a heptamer and nanocubes is designed and analyzed. A numerical simulation by the finite element method reveals that the nanoantenna achieves the optical electric anapole modes, thereby significantly enhancing the coupling between different dielectrics to further improve the near-field enhancement and spontaneous radiation. Field enhancement factors |E/E0|2 of 3,563 and 5,395 (AM1 and AM2) and a Purcell factor of 3,872 are observed in the wavelength range between 350 and 800 nm. This nanoantenna has promising potential in applications involving surface-enhanced Raman scattering and nonlinearities due to its low cost and excellent compatibility. Journal {\textcopyright} 2023 Optica Publishing Group.",

author = "Debao WANG and Jingwei LV and Jianxin WANG and Yanru REN and Ying YU and Wei LI and CHU, {Paul K.} and Chao LIU",

year = "2023",

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TY - JOUR

T1 - Design of optical anapole modes of all-dielectric nanoantennas for SERS applications

AU - WANG, Debao

AU - LV, Jingwei

AU - WANG, Jianxin

AU - REN, Yanru

AU - YU, Ying

AU - LI, Wei

AU - CHU, Paul K.

AU - LIU, Chao

PY - 2023/7/10

Y1 - 2023/7/10

N2 - To obtain large electric field enhancement while mitigating material losses, an all-dielectric nanoantenna composed of a heptamer and nanocubes is designed and analyzed. A numerical simulation by the finite element method reveals that the nanoantenna achieves the optical electric anapole modes, thereby significantly enhancing the coupling between different dielectrics to further improve the near-field enhancement and spontaneous radiation. Field enhancement factors |E/E0|2 of 3,563 and 5,395 (AM1 and AM2) and a Purcell factor of 3,872 are observed in the wavelength range between 350 and 800 nm. This nanoantenna has promising potential in applications involving surface-enhanced Raman scattering and nonlinearities due to its low cost and excellent compatibility. Journal © 2023 Optica Publishing Group.

AB - To obtain large electric field enhancement while mitigating material losses, an all-dielectric nanoantenna composed of a heptamer and nanocubes is designed and analyzed. A numerical simulation by the finite element method reveals that the nanoantenna achieves the optical electric anapole modes, thereby significantly enhancing the coupling between different dielectrics to further improve the near-field enhancement and spontaneous radiation. Field enhancement factors |E/E0|2 of 3,563 and 5,395 (AM1 and AM2) and a Purcell factor of 3,872 are observed in the wavelength range between 350 and 800 nm. This nanoantenna has promising potential in applications involving surface-enhanced Raman scattering and nonlinearities due to its low cost and excellent compatibility. Journal © 2023 Optica Publishing Group.

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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85166488686&origin=recordpage

U2 - 10.1364/AO.494145

DO - 10.1364/AO.494145

M3 - RGC 21 - Publication in refereed journal

SN - 1559-128X

VL - 62

SP - 5538

EP - 5546

JO - Applied Optics

JF - Applied Optics

IS - 20

ER -

Design of optical anapole modes of all-dielectric nanoantennas for SERS applications

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