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arXiv · 2604.19428

Directional Scattering-Induced Optical Forces on a Mie Particle near a Metal Interface

Semyon Borodulin·Natalia Kostina·Mihail Petrov
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Abstract

Optical manipulation of Mie-resonant dielectric nanoparticles is strongly influenced by their enhanced scattering and multipolar response, which fundamentally modifiesthe balance of optical forces. In this work, we study the optical forces acting on a resonant dielectric nanoparticle placed near a metal interface, where scattering occurs into both free-space and surface plasmon-polariton (SPP) channels. We show that the interference of electric and magnetic dipole moments leads to highly directional scattering in these channels, and the direction and magnitude of the scattering-induced force are directly linked to the angular directivity of the corresponding radiation channels. We show that in a cross-beam configuration, where the radiation-pressure contribution is suppressed, the optical force can be changed for almost 2{\pi} in a wide range of particle sizes that provides a route toward optical sorting of resonant nanoparticles.

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Semyon Borodulin, Natalia Kostina, Mihail Petrov. 2026-04-21. Directional Scattering-Induced Optical Forces on a Mie Particle near a Metal Interface. https://arxiv.org/abs/2604.19428

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