# Linear control of light scattering with multiple coherent light excitation

## TL;DR

This paper demonstrates how multiple coherent light waves can be linearly controlled to manipulate scattering and energy distribution in passive systems, offering a non-invasive method for advanced light-matter interaction.

## Contribution

It introduces a wave interferometric approach to control scattering states via extrinsic coherent wave superposition, independent of system configurations.

## Key findings

- Extrinsic interference can tailor energy distribution among radiation and dissipation.
- Formulas for dissipation and scattering powers in cylindrical systems are derived.
- Interferometric control is effective regardless of system size, material, or structure.

## Abstract

With the wave interferometric approach, we study how extrinsically multiple coherent waves excitation can dramatically alter the overall scattering states, resulting in tailoring the energy assignment among radiation and dissipation. To explore the concept, we derive the corresponding formulas for dissipation and scattering powers for cylindrical passive systems encountered by general configurations of incident waves with various illuminating directions, phases, and intensities. We demonstrate that a linear superposition of incident waves extrinsically interferes the target channels in a desirable way. Moreover, the interferometric results can be irrespective to the inherent system configurations like size, materials, and structures. The extrinsic interfering waves pave a non-invasive solution to manipulate light and matter interaction, with potential applications in metasurfaces, nanophotonics, and metadevices.