A1 Refereed original research article in a scientific journal
Linear optical properties of organic microcavity polaritons with non-Markovian quantum state diffusion
Authors: Leppälä Timo, Abdelmagid Ahmed Gabe, Qureshi Hassan A., Daskalakis Konstantinos S., Luoma Kimmo
Publisher: WALTER DE GRUYTER GMBH
Publishing place: BERLIN
Publication year: 2024
Journal: Nanophotonics
Journal name in source: NANOPHOTONICS
Journal acronym: NANOPHOTONICS-BERLIN
Volume: 13
Issue: 14
First page : 2479
Last page: 2490
Number of pages: 12
ISSN: 2192-8606
eISSN: 2192-8614
DOI: https://doi.org/10.1515/nanoph-2023-0749
Web address : https://doi.org/10.1515/nanoph-2023-0749
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/387334221
Hybridisation of the cavity modes and the excitons to polariton states together with the coupling to the vibrational modes determine the linear optical properties of organic semiconductors in microcavities. In this article we compute the refractive index for such system using the Holstein-Tavis-Cummings model and determine then the linear optical properties using the transfer matrix method. We first extract the parameters for the exciton in our model from fitting to experimentally measured absorption of a 2,7-bis[9,9-di(4-methylphenyl)-fluoren-2-yl]-9,9-di(4-methylphenyl) fluorene (TDAF) molecular thin film. Then we compute the reflectivity of such a thin film in a metal clad microcavity system by including the dispersive microcavity mode to the model. We compute susceptibility of the model systems evolving just a single state vector by using the non-Markovian quantum state diffusion. The computed location and height of the lower and upper polaritons agree with the experiment within the estimated errorbars for small angles (<= 30(degrees)). For larger angles the location of the polariton resonances are within the estimated error.
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