T-matrix calculations of spin-dependent optical forces in optically trapped nanowires


We present computational results associated with the onset of a spin-dependent optical force component occurring on zinc oxide nanowires trapped in optical tweezers with circularly polarized light. This type of non-conservative force appears directed perpendicularly with respect to the propagation direction of the incident light on the nanowires both for plane wave illumination and for optical tweezers. We show how this transverse optical force component is also shape dependent and connected with the imaginary part of the local Poynting vector and the local spin density.

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We acknowledge financial contribution from the Agreement ASI-INAF n.2018-16-HH.0, Project ‘SPACE Tweezers’ and the Czech Science Agency (19-17765S).

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Correspondence to R. Saija.

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Focus Point on Light Pressure across All Scales. Guest editors: A. Macchi, O. M. Maragò.

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Polimeno, P., Iatì, M.A., Degli Esposti Boschi, C. et al. T-matrix calculations of spin-dependent optical forces in optically trapped nanowires. Eur. Phys. J. Plus 136, 86 (2021). https://doi.org/10.1140/epjp/s13360-020-01057-5

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