A Cavity-Enhanced Spectroscopist's Lens on Molecular Polaritons

TL;DR

This paper offers a tutorial perspective on molecular polaritons, clarifying which phenomena are genuinely quantum and which can be explained classically, to advance understanding in cavity quantum electrodynamics and spectroscopy.

Contribution

It provides a classical optics-based framework for understanding molecular polaritons, bridging quantum and classical descriptions for the scientific community.

Findings

Clarifies the distinction between quantum and classical phenomena in polariton chemistry.

Recasts open questions in cavity-enhanced spectroscopy in accessible terms.

Provides a comprehensive tutorial on polariton formation and behavior.

Abstract

Polariton chemistry has been hailed as a potential new route to direct molecular processes with electromagnetic fields. To make further strides, it is essential for the community to clarify which unusual polaritonic phenomena are true hallmarks of cavity quantum electrodynamics and which can be rationalized with classical optical physics. Here, we provide a tutorial perspective on the formation, spectroscopy, and behavior of molecular polaritons using classical optics. Where possible, we draw connections to cavity-enhanced spectroscopy and recast open questions in terms that may be more familiar to the broader community of physical chemists.