Intensity‐Gradient Force: Kerker‐Type Intensity‐Gradient Force of Light (Laser Photonics Rev. 14(4)/2020)

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In article number 1900265 by Yao Zhang and co-workers, a nontrivial optical intensity-gradient force is uncovered in conventional optical tweezers set-ups. This force is excited by the Kerker effects inside high-index dielectric nanoparticles. Its non-conservative and anisotropic properties are in sharp contrast to the classical widespread picture of optical intensity-gradient forces. Its repulsive effects, moreover, could be exploited for high-resolution all-optical sorting.