Optical control of scattering, absorption and lineshape in nanoparticles

TL;DR

This paper derives exact conditions for controlling scattering and absorption in nanoparticles using simple incident fields, enabling tailored spectral responses and spatial distributions of internal and scattered fields.

Contribution

It introduces a method to precisely manipulate nanoparticle optical properties and spectral lineshapes using specific incident field configurations.

Findings

Conditions for enhancing or suppressing fields are derived.

Spectral lineshape can be engineered with narrow features.

Control over spatial distribution and angular momentum of fields is achieved.

Abstract

We find exact conditions for the enhancement or suppression of internal and/or scattered fields and the determination of their spatial distribution or angular momentum through the combination of simple fields. The incident fields can be generated by a single monochromatic or broad band light source, or by several sources, which may also be impurities embedded in the nanoparticle. We can design the lineshape of a particle introducing very narrow features in its spectral response.