Thermalization rate of polaritons in strongly-coupled molecular systems

Autor(en)

Evgeny A. Tereshchenkov, Ivan V. Panyukov, Mikhail Misko, Vladislav Y. Shishkov, Evgeny S. Andrianov, Anton V. Zasedatelev

Abstrakt

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.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Dukhov Research Institute of Automatics (VNIIA), Russian Academy of Sciences, Moscow Institute of Physics and Technology

Journal

Nanophotonics

Band

13

Seiten

2635–2649

Anzahl der Seiten

15

ISSN

2192-8614

DOI

https://doi.org/10.48550/arXiv.2311.09896

Publikationsdatum

03-2024

Peer-reviewed

Ja

ÖFOS 2012

103025 Quantenmechanik, 103021 Optik

Schlagwörter

ASJC Scopus Sachgebiete

Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Biotechnology

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/ce3bb7c7-a60c-4af2-bf20-c63f51c376bc