Polaritonic Huang-Rhys Factor: Basic Concepts and Quantifying Light-Matter Interactions in Media.

Area of Science:

• Solid State Physics
• Quantum Electrodynamics
• Spectroscopy

Background:

• The Huang-Rhys (HR) factor is crucial for understanding electron-phonon (vibronic) coupling in materials.
• Existing methods often lack the ability to comprehensively describe light-matter interactions in complex environments.

Purpose of the Study:

• To introduce a novel metric, the polaritonic HR factor, for quantifying light-matter coupling.
• To incorporate the effects of permanent dipoles and dipole self-energy into a unified framework.
• To provide a parameter-free theoretical tool for analyzing these interactions.

Main Methods:

• Development of a theoretical framework based on macroscopic quantum electrodynamics.
• Evaluation of the polaritonic HR factor, reorganization dipole self-coupling, and modified light-matter coupling strength.
• Application to arbitrary dielectric environments.

Main Results:

• The proposed polaritonic HR factor effectively quantifies light-matter coupling.
• The theory successfully accounts for polaritonic displacements and reorganization dipole self-coupling.
• Calculated magnitudes show strong agreement with prior experimental findings.

Conclusions:

• The polaritonic HR factor offers a new perspective for analyzing light-matter interactions.
• This framework provides a robust, parameter-free method for studying vibronic coupling in diverse media.
• The study enhances the understanding of polaritonic effects in condensed matter systems.