Thermalization rate of polaritons in strongly-coupled molecular systems
- URL: http://arxiv.org/abs/2311.09896v2
- Date: Fri, 1 Mar 2024 16:40:38 GMT
- Title: Thermalization rate of polaritons in strongly-coupled molecular systems
- Authors: Evgeny A. Tereshchenkov, Ivan V. Panyukov, M. Misko, Vladislav Yu.
Shishkov, Evgeny S. Andrianov and Anton V. Zasedatelev
- Abstract summary: Polariton thermalization is a key process in achieving light-matter Bose--Einstein condensation.
We develop a microscopic theory addressing polariton thermalization in strongly-coupled molecular systems.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Polariton thermalization is a key process in achieving light-matter
Bose--Einstein condensation, spanning from solid-state semiconductor
microcavities at cryogenic temperatures to surface plasmon nanocavities with
molecules at room temperature. Originated from the matter component of
polariton states, the microscopic mechanisms of thermalization are closely tied
to specific material properties. In this work, we investigate polariton
thermalization in strongly-coupled molecular systems. We develop a microscopic
theory addressing polariton thermalization through electron-phonon interactions
(known as exciton-vibration coupling) with low-energy molecular vibrations.
This theory presents a simple analytical method to calculate the
temperature-dependent polariton thermalization rate, utilizing experimentally
accessible spectral properties of bare molecules, such as the Stokes shift and
temperature-dependent linewidth of photoluminescence, in conjunction with
well-known parameters of optical cavities. Our findings demonstrate qualitative
agreement with recent experimental reports of nonequilibrium polariton
condensation in both ground and excited states, and explain the thermalization
bottleneck effect observed at low temperatures. This study showcases the
significance of vibrational degrees of freedom in polariton condensation and
offers practical guidance for future experiments, including the selection of
suitable material systems and cavity designs.
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