The distribution of electromagnetic waves and forces in a dispersive chiral cylinder

Abstract

By introducing the effects of bound electric and magnetic charges, the mechanical interaction between waves and a chiral cylinder is investigated with the auxiliary differential equations finite-difference timedomain method. The trapping Lorentz force density distributions of an active chiral cylinder, as well as a core-shell cylinder consisting of a chiral shell and a dielectric core illuminated by a normally incident plane wave are simulated. Numerical results show that the working principle is based on gradient forces generated by the continuously coupled cross-polarized waves. This finding may provide a promising avenue in chirality detection and sorting chiral particles from achiral ones. Keywords: chiral media, electromagnetic, optics, dispersion Classification: Optical systems References[1] A. Ashkin, et al.: "Observation of a single-beam gradient force optical trap for dielectric particles," Opt. Lett. 11 (1986)