Fabrication of Hybrid Nanostructures via Nanoscale Laser-Induced Reshaping for Advanced Light Manipulation

TL;DR

This paper introduces a femtosecond laser technique to selectively reshape hybrid metal-dielectric nanostructures, enabling precise control over their optical scattering properties for advanced light manipulation.

Contribution

A novel laser-based method for fabricating and tuning ordered hybrid nanostructures with selective reshaping of metal components without affecting dielectric parts.

Findings

Selective reshaping of Au-Si nanoparticles achieved.

Tuning of scattering properties demonstrated in the visible range.

Experimental results supported by simulations.

Abstract

Hybrid nanophotonics based on metal-dielectric nanostructures unifies the advantages of plasmonics and all-dielectric nanophotonics providing strong localization of light, magnetic optical response and specifically designed scattering properties. Here we demonstrate a novel approach for fabrication of ordered hybrid nanostructures via femtosecond laser melting of asymmetrical metal-dielectric (Au-Si) nanoparticles created by lithographical methods. The approach allows selective reshaping of the metal components of the hybrid nanoparticles without affecting dielectric ones. We apply the developed approach for tuning of the hybrid nanostructures scattering properties in the visible range. The experimental results are supported by molecular dynamics simulation and numerical solving of Maxwell equations.