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Lateral optical force on chiral particles near a surface

Author

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  • S. B. Wang

    (The Hong Kong University of Science and Technology, Clear Water Bay)

  • C. T. Chan

    (The Hong Kong University of Science and Technology, Clear Water Bay)

Abstract

Light can exert radiation pressure on any object it encounters and that resulting optical force can be used to manipulate particles. It is commonly assumed that light should move a particle forward and indeed an incident plane wave with a photon momentum ħ k can only push any particle, independent of its properties, in the direction of k. Here we demonstrate, using full-wave simulations, that an anomalous lateral force can be induced in a direction perpendicular to that of the incident photon momentum if a chiral particle is placed above a substrate that does not break any left–right symmetry. Analytical theory shows that the lateral force emerges from the coupling between structural chirality (the handedness of the chiral particle) and the light reflected from the substrate surface. Such coupling induces a sideway force that pushes chiral particles with opposite handedness in opposite directions.

Suggested Citation

  • S. B. Wang & C. T. Chan, 2014. "Lateral optical force on chiral particles near a surface," Nature Communications, Nature, vol. 5(1), pages 1-8, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4307
    DOI: 10.1038/ncomms4307
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    Cited by:

    1. Adrià Canós Valero & Hadi K. Shamkhi & Anton S. Kupriianov & Thomas Weiss & Alexander A. Pavlov & Dmitrii Redka & Vjaceslavs Bobrovs & Yuri Kivshar & Alexander S. Shalin, 2023. "Superscattering emerging from the physics of bound states in the continuum," Nature Communications, Nature, vol. 14(1), pages 1-13, December.
    2. Fan Nan & Francisco J. Rodríguez-Fortuño & Shaohui Yan & Jack J. Kingsley-Smith & Jack Ng & Baoli Yao & Zijie Yan & Xiaohao Xu, 2023. "Creating tunable lateral optical forces through multipolar interplay in single nanowires," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    3. Shubo Wang & Guanqing Zhang & Xulong Wang & Qing Tong & Jensen Li & Guancong Ma, 2021. "Spin-orbit interactions of transverse sound," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    4. Yijie Shen & Zhensong Wan & Xing Fu & Mali Gong & Xilin Yang & Ruoyang Qi & Mali Gong, 2018. "Recent Advances on Tunable Vortex Beam Devices for Biomedical Applications," Biomedical Journal of Scientific & Technical Research, Biomedical Research Network+, LLC, vol. 9(3), pages 7134-7138, September.

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