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Theory of optical forces on small particles by multiple plane waves

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posted on 2023-11-30, 05:14 authored by Ehsan Mobini, Aso Rahimzadegan, Carsten Rockstuhl, Rasoul Alaee
We theoretically investigate the optical force exerted on an isotropic particle illuminated by a superposition of plane waves. We derive explicit analytical expressions for the exerted force up to quadrupolar polarizabilities. Based on these analytical expressions, we demonstrate that an illumination consisting of two tilted plane waves can provide a full control on the optical force. In particular, optical pulling, pushing and lateral forces can be obtained by the proper tuning of illumination parameters. Our findings might unlock multiple applications based on a deterministic control of the spatial motion of small particles.

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