August 28, 2022 to September 1, 2022
Serbian Academy of Sciences and Arts – SASA
Europe/Belgrade timezone

Exciton-phonon effects in the spectra of microcavity polaritons

Aug 30, 2022, 3:30 PM
Main Hall (Serbian Academy of Sciences and Arts)

Main Hall

Serbian Academy of Sciences and Arts

Board: S06-CMPSP-110
Oral presentation S06 Condensed Matter Physics and Statistical Physics S06 Condensed Matter Physics and Statistical Physics


Ivan Lalov (Professor, Sofia University)


The coupling of Frenkel excitons (FEs) and intramolecular vibrations in an organic layer as a part of microcavity has been studied in the paper. Two cases are treated: a) uniaxial layer of point group 4 (optical axis is supposed perpendicular to the layer); b) monoclinic anthracene-like layer with monoclinic axis b perpendicular to the layer. The exciton-phonon coupling produces the vibronic wings with complex spectra which can contain bound exciton-phonon states and many-particle (unbound) bands. Consequently in those regions the absorption lines and the resonance members in dielectric tensor appear. We treat theoretically their effects on the polaritons in the microcavity and illustrate using numerical calculations the peculiarities of the polaritonic spectra in the vibronic wings of Frenkel excitons.

Primary authors

Ivan Lalov (Professor, Sofia University) Prof. Victor Ivanov (Faculty of Physics, Sofia University, Sofia 1164, Bulgaria)

Presentation materials