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Optimisation and scaling effect of dual-waveguide optical trapping in the SOI platform

Optimisation and scaling effect of dual-waveguide optical trapping in the SOI platform
Optimisation and scaling effect of dual-waveguide optical trapping in the SOI platform
Optical trapping has potential applications in biological manipulation, particle trapping, Raman spectroscopy, and quantum optomechanics. Among the various optical trapping schemes, on-chip dual-waveguide traps combine benefits of stable trapping and mass production. However, no systematic research has been conducted to optimise on-chip dual-waveguide traps so that the trapping capability is maximised. Here, a numerical simulation of an on-chip silicon on insulator (SOI) dual-waveguide optical trap based on Lumerical FDTD Solutions is carried out to optimise the on-chip dual-waveguide trap. It was found that the waveguide thickness is a crucial parameter when designing a dual-waveguide trap, and its optical trapping capability largely depends on the distance between the two waveguides. We show that the optimal waveguide thickness to achieve the maximum trapping capability generally increases with the gap distance, accompanied by a periodic feature due to the interference and the resonant effects within the gap. This optimal waveguide thickness and gap distance are analysed to have clear scaling effects over the input optical wavelength, which paves the way for the design and optimisation of dual-waveguide traps for various applications.
1094-4087
33285-33297
Xu, Xiangming
4e94142c-c4ed-4d05-8c49-49edab3d0251
Thomson, David
17c1626c-2422-42c6-98e0-586ae220bcda
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
Xu, Xiangming
4e94142c-c4ed-4d05-8c49-49edab3d0251
Thomson, David
17c1626c-2422-42c6-98e0-586ae220bcda
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828

Xu, Xiangming, Thomson, David and Yan, Jize (2020) Optimisation and scaling effect of dual-waveguide optical trapping in the SOI platform. Optics Express, 28 (22), 33285-33297. (doi:10.1364/OE.403151).

Record type: Article

Abstract

Optical trapping has potential applications in biological manipulation, particle trapping, Raman spectroscopy, and quantum optomechanics. Among the various optical trapping schemes, on-chip dual-waveguide traps combine benefits of stable trapping and mass production. However, no systematic research has been conducted to optimise on-chip dual-waveguide traps so that the trapping capability is maximised. Here, a numerical simulation of an on-chip silicon on insulator (SOI) dual-waveguide optical trap based on Lumerical FDTD Solutions is carried out to optimise the on-chip dual-waveguide trap. It was found that the waveguide thickness is a crucial parameter when designing a dual-waveguide trap, and its optical trapping capability largely depends on the distance between the two waveguides. We show that the optimal waveguide thickness to achieve the maximum trapping capability generally increases with the gap distance, accompanied by a periodic feature due to the interference and the resonant effects within the gap. This optimal waveguide thickness and gap distance are analysed to have clear scaling effects over the input optical wavelength, which paves the way for the design and optimisation of dual-waveguide traps for various applications.

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Accepted/In Press date: 28 September 2020
Published date: 21 October 2020

Identifiers

Local EPrints ID: 444363
URI: http://eprints.soton.ac.uk/id/eprint/444363
ISSN: 1094-4087
PURE UUID: 86a91e98-d7ea-4f51-9995-cc91acda3e69
ORCID for Jize Yan: ORCID iD orcid.org/0000-0002-2886-2847

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Date deposited: 14 Oct 2020 16:30
Last modified: 18 Feb 2021 17:25

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