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Measurement of Ultrafast Vibrational Coherences in Polyatomic Radical Cations with Strong-Field Adiabatic Ionization

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Collision-induced spectroscopy and radiative association in microcavities.

Tuan H Nguyen¹, Raphael F Ribeiro¹

¹Department of Chemistry and Cherry Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, USA.

The Journal of Chemical Physics

|July 17, 2025

Summary

Microcavities subtly affect collision-induced emission but significantly enhance radiative association in gas mixtures. This research offers new ways to control molecular interactions and radiative kinetics using confined light-matter interactions.

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Area of Science:

Physical Chemistry
Quantum Optics
Materials Science

Background:

Polariton chemistry utilizes strong light-matter interactions within confined photonic structures.
Controlling intermolecular interactions and radiative processes is crucial for chemical applications.

Purpose of the Study:

Investigate collision-induced emission and radiative association in planar microcavities.
Analyze the impact of variable light-matter coupling strengths on these processes.
Explore the use of microcavities for controlling molecular dynamics.

Main Methods:

Employed a classical electrodynamics-molecular dynamics method.
Simulated collisions in an argon-xenon (Ar-Xe) gas mixture coupled to a confined electromagnetic field.
Varied light-matter coupling strengths to observe effects.

Main Results:

Microcavity effects on collision-induced emission spectra were found to be subtle.
Radiative association showed significant enhancement within the microcavity, even at high coupling strengths.
Microcavities can alter the statistical distribution of Ar-Xe complex lifetimes.

Conclusions:

Microcavities offer a pathway to significantly enhance radiative association.
Findings provide insights into controlling intermolecular interactions and radiative kinetics.
The study demonstrates potential for designing microcavities to tune molecular behavior.