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Plasmon enhanced optical tweezers with gold-coated black silicon

Plasmon enhanced optical tweezers with gold-coated black silicon
Plasmon enhanced optical tweezers with gold-coated black silicon
Plasmonic optical tweezers are a ubiquitous tool for the precise manipulation of nanoparticles and biomolecules at low photon flux, while femtosecond-laser optical tweezers can probe the nonlinear optical properties of the trapped species with applications in biological diagnostics. In order to adopt plasmonic optical tweezers in real-world applications, it is essential to develop large-scale fabrication processes without compromising the trapping efficiency. Here, we develop a novel platform for continuous wave (CW) and femtosecond plasmonic optical tweezers, based on gold-coated black silicon. In contrast with traditional lithographic methods, the fabrication method relies on simple, single-step, maskless tabletop laser processing of silicon in water that facilitates scalability. Gold-coated black silicon supports repeatable trapping efficiencies comparable to the highest ones reported to date. From a more fundamental aspect, a plasmon-mediated efficiency enhancement is a resonant effect, and therefore, dependent on the wavelength of the trapping beam. Surprisingly, a wavelength characterization of plasmon-enhanced trapping efficiencies has evaded the literature. Here, we exploit the repeatability of the recorded trapping efficiency, offered by the gold-coated black silicon platform, and perform a wavelength-dependent characterization of the trapping process, revealing the resonant character of the trapping efficiency maxima. Gold-coated black silicon is a promising platform for large-scale parallel trapping applications that will broaden the range of optical manipulation in nanoengineering, biology, and the study of collective biophotonic effects.
1-7
Kotsidaki, D.G.
54271de4-ca49-421d-88a8-67c42a50a303
Kandyla, M.
2e387d7b-d085-40c9-af28-0cd33a8556ee
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Kotsidaki, D.G.
54271de4-ca49-421d-88a8-67c42a50a303
Kandyla, M.
2e387d7b-d085-40c9-af28-0cd33a8556ee
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf

Kotsidaki, D.G., Kandyla, M. and Lagoudakis, P.G. (2016) Plasmon enhanced optical tweezers with gold-coated black silicon. Scientific Reports, 6 (26275), 1-7. (doi:10.1038/srep26275).

Record type: Article

Abstract

Plasmonic optical tweezers are a ubiquitous tool for the precise manipulation of nanoparticles and biomolecules at low photon flux, while femtosecond-laser optical tweezers can probe the nonlinear optical properties of the trapped species with applications in biological diagnostics. In order to adopt plasmonic optical tweezers in real-world applications, it is essential to develop large-scale fabrication processes without compromising the trapping efficiency. Here, we develop a novel platform for continuous wave (CW) and femtosecond plasmonic optical tweezers, based on gold-coated black silicon. In contrast with traditional lithographic methods, the fabrication method relies on simple, single-step, maskless tabletop laser processing of silicon in water that facilitates scalability. Gold-coated black silicon supports repeatable trapping efficiencies comparable to the highest ones reported to date. From a more fundamental aspect, a plasmon-mediated efficiency enhancement is a resonant effect, and therefore, dependent on the wavelength of the trapping beam. Surprisingly, a wavelength characterization of plasmon-enhanced trapping efficiencies has evaded the literature. Here, we exploit the repeatability of the recorded trapping efficiency, offered by the gold-coated black silicon platform, and perform a wavelength-dependent characterization of the trapping process, revealing the resonant character of the trapping efficiency maxima. Gold-coated black silicon is a promising platform for large-scale parallel trapping applications that will broaden the range of optical manipulation in nanoengineering, biology, and the study of collective biophotonic effects.

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More information

Accepted/In Press date: 26 April 2016
e-pub ahead of print date: 19 May 2016
Published date: 19 May 2016
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 396133
URI: http://eprints.soton.ac.uk/id/eprint/396133
PURE UUID: ce9620f3-f54e-4c49-97e0-5096d85748d3

Catalogue record

Date deposited: 07 Jun 2016 13:06
Last modified: 02 Dec 2019 20:10

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