Chiral plasmonics

TL;DR

This paper provides a comprehensive overview of chiral plasmonic nanostructures, including fabrication methods, active control of optical responses, and potential applications in enantiomeric sensing.

Contribution

It offers a detailed synthesis of static and active chiral plasmonic systems, highlighting recent advances and future prospects.

Findings

Diverse fabrication techniques for chiral plasmonic structures

Active control of chiral optical responses demonstrated

Potential for enantiomeric sensing applications

Abstract

We present a comprehensive overview of chirality and its optical manifestation in plasmonic nanosystems and nanostructures. We discuss top-down fabricated structures that range from solid metallic nanostructures to groupings of metallic nanoparticles arranged in three dimensions. We also present the large variety of bottom-up synthesized structures. Using DNA, peptides, or other scaffolds, complex nanoparticle arrangements of up to hundreds of individual nanoparticles have been realized. Beyond this static picture, we also give an overview of recent demonstrations of active chiral plasmonic systems, where the chiral optical response can be controlled by an external stimulus. We discuss the prospect of using the unique properties of complex chiral plasmonic systems for enantiomeric sensing schemes.