Coherent control near metallic nanostructures

TL;DR

This paper investigates how metallic nanostructures can enhance and modify local electromagnetic fields for coherent control, using linear response theory to tailor external fields for desired local effects.

Contribution

It introduces a method to analyze and solve the inverse problem of designing external fields to achieve specific local control fields near nanostructures.

Findings

Nanostructure geometry significantly influences field enhancement.

The local control field's amplitude and phase are substantially altered.

A solution to the inverse problem of field design is provided.

Abstract

We study coherent control in the vicinity of metallic nanostructures. Unlike in the case of control in gas or liquid phase, the collective response of electrons in a metallic nanostructure can significantly enhance different frequency components of the control field. This enhancement strongly depends on the geometry of the nanostructure and can substantially modify the temporal profile of the local control field. The changes in the amplitude and phase of the control field near the nanostructure are studied using linear response theory. The inverse problem of finding the external electromagnetic field to generate the desired local control field is considered and solved.