Fano resonance-assisted all-dielectric array for enhanced near-field optical trapping of nanoparticles

Donato Conteduca; Saba N. Khan; Manuel A. Martínez Ruiz; Graham D. Bruce; Thomas F. Krauss; Kishan Dholakia

doi:10.1021/acsphotonics.3c01126

Fano resonance-assisted all-dielectric array for enhanced near-field optical trapping of nanoparticles

Donato Conteduca, Saba N. Khan, Manuel A. Martínez Ruiz, Graham D. Bruce, Thomas F. Krauss^*, Kishan Dholakia^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Near-field optics can overcome the diffraction limit by creating strong optical gradients to enable the trapping of nanoparticles. However, it remains challenging to achieve efficient, stable trapping without heating and thermal effects. Dielectric structures have been used to address this issue but usually offer weak trap stiffness. In this work, we exploit the Fano resonance effect in an all-dielectric quadrupole nanostructure to realize a 20-fold enhancement of trap stiffness, compared to the off-resonance case. This enables a high effective trap stiffness of 1.19 fN/nm for 100 nm diameter polystyrene nanoparticles with 4.2 mW/μm² illumination. Furthermore, we demonstrate the capability of the structure to simultaneously trap two particles at distinct locations within the nanostructure array.

Original language	English
Number of pages	7
Journal	ACS Photonics
Volume	Articles ASAP
Early online date	14 Nov 2023
DOIs	https://doi.org/10.1021/acsphotonics.3c01126
Publication status	E-pub ahead of print - 14 Nov 2023

Keywords

Optical trapping
Fano resonance effect
Near-field enhancement
Dielectric nanostructure
Polystyrene nanoparticles

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10.1021/acsphotonics.3c01126Licence: CC BY

Conteduca_2023_ACSP_Fano_CCBY
Copyright © 2023 The Authors. Open Access. Published by American Chemical Society. This publication is licensed under a Creative Commons Attribution licence, CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/).
Final published version, 5.56 MBLicence: CC BY

1 Finished

Resonant and shaped photonics for under: Resonant and shaped photonics for understanding the physical and biomedical world
Dholakia, K. (PI) & Gather, M. C. (CoI)
1/08/17 → 31/07/22
Project: Standard

Data underpinning "Fano resonance-assisted dielectric array for enhanced near-field trapping of nanoparticles"
Khan, S. (Creator), Conteduca, D. (Creator), Martinez Ruiz, M. A. (Creator), Bruce, G. D. (Creator), Krauss, T. F. (Creator) & Dholakia, K. (Creator), University of St Andrews, 15 Apr 2024
DOI: 10.17630/ab669c30-0987-4874-b8d3-a04d3a7ff367
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Fano resonance-assisted all-dielectric array for enhanced near-field optical trapping of nanoparticles
Conteduca, D., Khan, S. N., Ruiz, M. A. M., Bruce, G. D., Krauss, T. F. & Dholakia, K., 7 Aug 2023, arXiv.
Research output: Working paper › Preprint

Cite this

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title = "Fano resonance-assisted all-dielectric array for enhanced near-field optical trapping of nanoparticles",

abstract = "Near-field optics can overcome the diffraction limit by creating strong optical gradients to enable the trapping of nanoparticles. However, it remains challenging to achieve efficient, stable trapping without heating and thermal effects. Dielectric structures have been used to address this issue but usually offer weak trap stiffness. In this work, we exploit the Fano resonance effect in an all-dielectric quadrupole nanostructure to realize a 20-fold enhancement of trap stiffness, compared to the off-resonance case. This enables a high effective trap stiffness of 1.19 fN/nm for 100 nm diameter polystyrene nanoparticles with 4.2 mW/μm2 illumination. Furthermore, we demonstrate the capability of the structure to simultaneously trap two particles at distinct locations within the nanostructure array.",

keywords = "Optical trapping, Fano resonance effect, Near-field enhancement, Dielectric nanostructure, Polystyrene nanoparticles",

author = "Donato Conteduca and Khan, {Saba N.} and Ruiz, {Manuel A. Mart{\'i}nez} and Bruce, {Graham D.} and Krauss, {Thomas F.} and Kishan Dholakia",

note = "Funding: This work was supported by the UK Engineering and Physical Sciences Research Council (EP/P030017/1), and the Australian Research Council (grant DP220102303).",

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doi = "10.1021/acsphotonics.3c01126",

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AU - Conteduca, Donato

AU - Khan, Saba N.

AU - Ruiz, Manuel A. Martínez

AU - Bruce, Graham D.

AU - Krauss, Thomas F.

AU - Dholakia, Kishan

N1 - Funding: This work was supported by the UK Engineering and Physical Sciences Research Council (EP/P030017/1), and the Australian Research Council (grant DP220102303).

PY - 2023/11/14

Y1 - 2023/11/14

N2 - Near-field optics can overcome the diffraction limit by creating strong optical gradients to enable the trapping of nanoparticles. However, it remains challenging to achieve efficient, stable trapping without heating and thermal effects. Dielectric structures have been used to address this issue but usually offer weak trap stiffness. In this work, we exploit the Fano resonance effect in an all-dielectric quadrupole nanostructure to realize a 20-fold enhancement of trap stiffness, compared to the off-resonance case. This enables a high effective trap stiffness of 1.19 fN/nm for 100 nm diameter polystyrene nanoparticles with 4.2 mW/μm2 illumination. Furthermore, we demonstrate the capability of the structure to simultaneously trap two particles at distinct locations within the nanostructure array.

AB - Near-field optics can overcome the diffraction limit by creating strong optical gradients to enable the trapping of nanoparticles. However, it remains challenging to achieve efficient, stable trapping without heating and thermal effects. Dielectric structures have been used to address this issue but usually offer weak trap stiffness. In this work, we exploit the Fano resonance effect in an all-dielectric quadrupole nanostructure to realize a 20-fold enhancement of trap stiffness, compared to the off-resonance case. This enables a high effective trap stiffness of 1.19 fN/nm for 100 nm diameter polystyrene nanoparticles with 4.2 mW/μm2 illumination. Furthermore, we demonstrate the capability of the structure to simultaneously trap two particles at distinct locations within the nanostructure array.

KW - Optical trapping

KW - Fano resonance effect

KW - Near-field enhancement

KW - Dielectric nanostructure

KW - Polystyrene nanoparticles

U2 - 10.1021/acsphotonics.3c01126

DO - 10.1021/acsphotonics.3c01126

M3 - Article

SN - 2330-4022

VL - Articles ASAP

JO - ACS Photonics

JF - ACS Photonics

ER -

Fano resonance-assisted all-dielectric array for enhanced near-field optical trapping of nanoparticles

Abstract

Keywords

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Resonant and shaped photonics for under: Resonant and shaped photonics for understanding the physical and biomedical world

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Data underpinning "Fano resonance-assisted dielectric array for enhanced near-field trapping of nanoparticles"

Research output

Fano resonance-assisted all-dielectric array for enhanced near-field optical trapping of nanoparticles

Cite this