Abstract

A chiral force was found to be induced upon rotation of planar nanoparticles under irradiation of linearly polarized light. The chiral force arises due to differing absorptions of left and right circularly polarized light, correlating with the circular dichroism (CD) of rotated nanoparticle. Charge distribution profiles, which arises from the excited localized surface plasmon polaritons induced by the light, can be used to predict the CD. This offers a simple method of using charge distributions to predict the dynamics of nanoparticles for optical alignment and orientation in the fabrication of various optical devices.

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