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Tunable on-chip optical traps for levitating particles based on single-layer metasurface

Tunable on-chip optical traps for levitating particles based on single-layer metasurface
Tunable on-chip optical traps for levitating particles based on single-layer metasurface
Optically levitated multiple nanoparticles have emerged as a platform for studying complex fundamental physics such as non-equilibrium phenomena, quantum entanglement, and light-matter interaction, which could be applied for sensing weak forces and torques with high sensitivity and accuracy. An optical trapping landscape of increased complexity is needed to engineer the interaction between levitated particles beyond the single harmonic trap. However, existing platforms based on spatial light modulators for studying interactions between levitated particles suffered from low efficiency, instability at focal points, the complexity of optical systems, and the scalability for sensing applications. Here, we experimentally demonstrated that a metasurface which forms two diffraction-limited focal points with a high numerical aperture (~0.9) and high efficiency (31%) can generate tunable optical potential wells without any intensity fluctuations. A bistable potential and double potential wells were observed in the experiment by varying the focal points’ distance, and two nanoparticles were levitated in double potential wells for hours, which could be used for investigating the levitated particles’ nonlinear dynam-ics, thermal dynamics, and optical binding. This would pave the way for scaling the number of levitated optomechanical devices or realizing paralleled levitated sensors.
Sun, Chuang
aecdd672-871a-4f6b-91db-ed98292addf2
Pi, Hailong
e275259b-31f8-430c-89d5-0d029740d60e
Kiang, Kian Shen
fdb609c6-75aa-4893-85c8-8e50edfda7fe
Georgescu, Tiberius S.
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Ou, Jun-Yu
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Ulbricht, Hendrik
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Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828
Sun, Chuang
aecdd672-871a-4f6b-91db-ed98292addf2
Pi, Hailong
e275259b-31f8-430c-89d5-0d029740d60e
Kiang, Kian Shen
fdb609c6-75aa-4893-85c8-8e50edfda7fe
Georgescu, Tiberius S.
90e287ef-1bc3-43a1-8cb7-38a47c440e07
Ou, Jun-Yu
3fb703e3-b222-46d2-b4ee-75f296d9d64d
Ulbricht, Hendrik
5060dd43-2dc1-47f8-9339-c1a26719527d
Yan, Jize
786dc090-843b-435d-adbe-1d35e8fc5828

Sun, Chuang, Pi, Hailong, Kiang, Kian Shen, Georgescu, Tiberius S., Ou, Jun-Yu, Ulbricht, Hendrik and Yan, Jize (2024) Tunable on-chip optical traps for levitating particles based on single-layer metasurface. Nanophotonics. (doi:10.48550/arXiv.2401.08852).

Record type: Article

Abstract

Optically levitated multiple nanoparticles have emerged as a platform for studying complex fundamental physics such as non-equilibrium phenomena, quantum entanglement, and light-matter interaction, which could be applied for sensing weak forces and torques with high sensitivity and accuracy. An optical trapping landscape of increased complexity is needed to engineer the interaction between levitated particles beyond the single harmonic trap. However, existing platforms based on spatial light modulators for studying interactions between levitated particles suffered from low efficiency, instability at focal points, the complexity of optical systems, and the scalability for sensing applications. Here, we experimentally demonstrated that a metasurface which forms two diffraction-limited focal points with a high numerical aperture (~0.9) and high efficiency (31%) can generate tunable optical potential wells without any intensity fluctuations. A bistable potential and double potential wells were observed in the experiment by varying the focal points’ distance, and two nanoparticles were levitated in double potential wells for hours, which could be used for investigating the levitated particles’ nonlinear dynam-ics, thermal dynamics, and optical binding. This would pave the way for scaling the number of levitated optomechanical devices or realizing paralleled levitated sensors.

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2401.08852 - Author's Original
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Accepted manuscript - Accepted Manuscript
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10.1515_nanoph-2023-0873 - Version of Record
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Accepted/In Press date: 7 March 2024
Published date: 15 April 2024

Identifiers

Local EPrints ID: 487942
URI: http://eprints.soton.ac.uk/id/eprint/487942
PURE UUID: 621b7619-5b6d-449c-90e1-fe500b1756b3
ORCID for Chuang Sun: ORCID iD orcid.org/0000-0001-7024-1916
ORCID for Kian Shen Kiang: ORCID iD orcid.org/0000-0002-7326-909X
ORCID for Jun-Yu Ou: ORCID iD orcid.org/0000-0001-8028-6130
ORCID for Hendrik Ulbricht: ORCID iD orcid.org/0000-0003-0356-0065
ORCID for Jize Yan: ORCID iD orcid.org/0000-0002-2886-2847

Catalogue record

Date deposited: 11 Mar 2024 17:38
Last modified: 22 Jun 2024 04:01

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Contributors

Author: Chuang Sun ORCID iD
Author: Hailong Pi
Author: Kian Shen Kiang ORCID iD
Author: Tiberius S. Georgescu
Author: Jun-Yu Ou ORCID iD
Author: Jize Yan ORCID iD

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