Analytic expression for the optical exciton transition rates in the polaron frame

Dominic M. Rouse, Erik M. Gauger, Brendon W. Lovett*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)
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Abstract

When an optical emitter is strongly coupled to a vibrational bath the polaron transformation is often used to permit an accurate second-order Redfield master equation. However, the optical transition rates in the polaron frame are not analytic and approximations typically need to be made, which result in the loss of anything other than simple additive effects of the two baths. In this paper, we derive an intuitive analytic expression for the polaron frame optical transition rates by means of a finite-mode truncation of the vibrational bath. Using this technique, calculations of the transition rates converge for only a few modes in the truncated spectral density, and capture nonadditive effects such as population inversion of a two-level system.
Original languageEnglish
Article number014302
Number of pages11
JournalPhysical Review B
Volume105
Issue number1
DOIs
Publication statusPublished - 7 Jan 2022

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