Coherent Control of Floquet-Mode Dressed Plasmon Polaritons

TL;DR

This paper investigates the coherent control of Floquet-mode dressed plasmon polaritons in nanostructures, demonstrating optical switching of light transmission via quantum interference effects in gold-based systems.

Contribution

It introduces a nonequilibrium Floquet framework to control plasmon polaritons and shows how intraband transitions enable optical switching in nanostructured gold.

Findings

Quantum interference reduces transmission in photonic waveguides.

External laser drives induce intraband transitions in gold.

Switching of light transmission is achieved through Floquet-dressed polaritons.

Abstract

We study the coherent properties of plasmon polaritons optically excited on periodic nanostructures. The gold grains are coupled to a single mode photonic waveguide which exhibits a dramatically reduced transmission originating from the derived quantum interference. With a nonequilibrium description of Floquet-dressed polaritons we demonstrate the switching of light transmission through the waveguide due to sheer existence of intraband transitions in gold from right above the Fermi level driven by the external laser light.