Excitation of single multipolar modes with engineered cylindrically symmetric fields

TL;DR

This paper introduces a method to selectively excite specific multipolar resonances in spherical particles by engineering the multipolar content of incident light beams, enabling precise control over scattering properties.

Contribution

The authors develop experimentally feasible techniques to generate light beams with tailored multipolar content, allowing for targeted excitation of single Mie resonances.

Findings

Selective excitation of single multipolar modes achieved

Enhanced control over scattered fields demonstrated

Techniques utilize angular momentum and focusing with aplanatic lenses

Abstract

We present a new method to address multipolar resonances and to control the scattered field of a spherical scatterer. This method is based on the engineering of the multipolar content of the incident beam. We propose experimentally feasible techniques to generate light beams which contain only a few multipolar modes. The techniques uses incident beams with a well defined component of the angular momentum and appropriate focusing with aplanatic lenses. The control of the multipolar content of light beams allow for the excitation of single Mie resonances and unprecedented control of the scattered field from spherical particles.