Affiliation:
1. Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC)
2. Instituto de Micro y Nanotecnología IMN-CNM
Abstract
In this article we use an exact method to resolve the fields scattered by a spherical magneto-optical particle and calculate the optical forces exerted on it. The resulting force and the contributing components, i.e. magneto-optical gradient force and magneto-optical extinction force, are presented in an analytical form. We also derive analytical expressions for the scattering and extinction cross sections of a magneto-optical particle, expressions which intuitively demonstrate the effect of circular dichroism in magneto-optical scattering and forces. Finally, we demonstrate that the magneto-optical extinction force is the result of circular dichroism in magneto-optical scattering. We show that it is possible to completely cancel the scattering in the forward or in the backward direction, when the incident field is composed of a circularly-polarized reflected beam. Moreover, the directional scattering is interrelated to the direction of the force exerted on the particle.
Funder
Comunidad de Madrid
Ministerio de Ciencia e Innovación
Subject
Atomic and Molecular Physics, and Optics
Cited by
4 articles.
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