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Coherently tunable metalens tweezers for optofluidic particle routing

Coherently tunable metalens tweezers for optofluidic particle routing
Coherently tunable metalens tweezers for optofluidic particle routing
Nanophotonic particle manipulation exploits unique light shaping capabilities of nanophotonic devices to trap, guide, rotate and propel particles in microfluidic channels. Recent introduction of metalens into microfluidics research demonstrates the new capability of using nanophotonics devices for far-field optical manipulation. In this work we demonstrate, via numerical simulation, the first tunable metalens tweezers that function under dual-beam illumination. The phase profile of the metalens is modulated by controlling the relative strength and phase of the two coherent incident light beams. As a result, the metalens creates a thin sheet of focus inside a microchannel. Changes to the illumination condition allow the focus to be swept across the microchannel, thereby producing a controllable and reconfigurable path for particle transport. Particle routing in a Y-branch junction, for both nano- and microparticles, is evaluated as an example functionality for the tunable metalens tweezers. This work shows that tunable far-field particle manipulation can be achieved using near-field nano-engineering and coherent control, opening a new way for the integration of nanophotonics and microfluidics.
1094-4087
38949-38959
Yin, Shengqi
363a868e-95cb-4354-b52f-0d4f9fcd3e70
He, Fei
0b5b12e2-82ec-407b-8e4f-a8ba024d9fb3
Kubo, Wakana
453b4e5c-4481-48b5-8f84-ca30ca2224e4
Wang, Qian
8fdfc49b-7545-4455-b04d-43cf2ce251ad
Frame, James
828e40bf-f524-4d8e-a915-efb7a515048b
Green, Nicolas
d9b47269-c426-41fd-a41d-5f4579faa581
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86
Yin, Shengqi
363a868e-95cb-4354-b52f-0d4f9fcd3e70
He, Fei
0b5b12e2-82ec-407b-8e4f-a8ba024d9fb3
Kubo, Wakana
453b4e5c-4481-48b5-8f84-ca30ca2224e4
Wang, Qian
8fdfc49b-7545-4455-b04d-43cf2ce251ad
Frame, James
828e40bf-f524-4d8e-a915-efb7a515048b
Green, Nicolas
d9b47269-c426-41fd-a41d-5f4579faa581
Fang, Xu
96b4b212-496b-4d68-82a4-06df70f94a86

Yin, Shengqi, He, Fei, Kubo, Wakana, Wang, Qian, Frame, James, Green, Nicolas and Fang, Xu (2020) Coherently tunable metalens tweezers for optofluidic particle routing. Optics Express, 28 (26), 38949-38959. (doi:10.1364/OE.411985).

Record type: Article

Abstract

Nanophotonic particle manipulation exploits unique light shaping capabilities of nanophotonic devices to trap, guide, rotate and propel particles in microfluidic channels. Recent introduction of metalens into microfluidics research demonstrates the new capability of using nanophotonics devices for far-field optical manipulation. In this work we demonstrate, via numerical simulation, the first tunable metalens tweezers that function under dual-beam illumination. The phase profile of the metalens is modulated by controlling the relative strength and phase of the two coherent incident light beams. As a result, the metalens creates a thin sheet of focus inside a microchannel. Changes to the illumination condition allow the focus to be swept across the microchannel, thereby producing a controllable and reconfigurable path for particle transport. Particle routing in a Y-branch junction, for both nano- and microparticles, is evaluated as an example functionality for the tunable metalens tweezers. This work shows that tunable far-field particle manipulation can be achieved using near-field nano-engineering and coherent control, opening a new way for the integration of nanophotonics and microfluidics.

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Coherently tunable metalens tweezers for optofluidic particle routing - Accepted Manuscript
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More information

Accepted/In Press date: 16 November 2020
e-pub ahead of print date: 9 December 2020
Published date: 21 December 2020

Identifiers

Local EPrints ID: 447637
URI: http://eprints.soton.ac.uk/id/eprint/447637
ISSN: 1094-4087
PURE UUID: 5ee30726-03f3-4a65-9e38-a400cd1dd592
ORCID for Nicolas Green: ORCID iD orcid.org/0000-0001-9230-4455
ORCID for Xu Fang: ORCID iD orcid.org/0000-0003-1735-2654

Catalogue record

Date deposited: 17 Mar 2021 17:33
Last modified: 15 Sep 2021 01:59

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