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Tomographic active optical trapping of arbitrarily shaped objects by exploiting 3D refractive index maps

Author

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  • Kyoohyun Kim

    (Korea Advanced Institute of Science and Technology (KAIST)
    KI for Health Science and Technology (KIHST), KAIST)

  • YongKeun Park

    (Korea Advanced Institute of Science and Technology (KAIST)
    KI for Health Science and Technology (KIHST), KAIST
    TomoCube Inc.)

Abstract

Optical trapping can manipulate the three-dimensional (3D) motion of spherical particles based on the simple prediction of optical forces and the responding motion of samples. However, controlling the 3D behaviour of non-spherical particles with arbitrary orientations is extremely challenging, due to experimental difficulties and extensive computations. Here, we achieve the real-time optical control of arbitrarily shaped particles by combining the wavefront shaping of a trapping beam and measurements of the 3D refractive index distribution of samples. Engineering the 3D light field distribution of a trapping beam based on the measured 3D refractive index map of samples generates a light mould, which can manipulate colloidal and biological samples with arbitrary orientations and/or shapes. The present method provides stable control of the orientation and assembly of arbitrarily shaped particles without knowing a priori information about the sample geometry. The proposed method can be directly applied in biophotonics and soft matter physics.

Suggested Citation

  • Kyoohyun Kim & YongKeun Park, 2017. "Tomographic active optical trapping of arbitrarily shaped objects by exploiting 3D refractive index maps," Nature Communications, Nature, vol. 8(1), pages 1-8, August.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15340
    DOI: 10.1038/ncomms15340
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    Cited by:

    1. Jiawei Sun & Bin Yang & Nektarios Koukourakis & Jochen Guck & Juergen W. Czarske, 2024. "AI-driven projection tomography with multicore fibre-optic cell rotation," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    2. Benjamin Landenberger & Yatish & Alexander Rohrbach, 2021. "Towards non-blind optical tweezing by finding 3D refractive index changes through off-focus interferometric tracking," Nature Communications, Nature, vol. 12(1), pages 1-11, December.

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