Dipolar coupling of nanoparticle-molecule assemblies: An efficient approach for studying strong coupling

Jakub Fojt, Tuomas P. Rossi, Tomasz J. Antosiewicz, Mikael Kuisma, Paul Erhart

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)
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Strong light-matter interactions facilitate not only emerging applications in quantum and non-linear optics but also modifications of properties of materials. In particular, the latter possibility has spurred the development of advanced theoretical techniques that can accurately capture both quantum optical and quantum chemical degrees of freedom. These methods are, however, computationally very demanding, which limits their application range. Here, we demonstrate that the optical spectra of nanoparticle-molecule assemblies, including strong coupling effects, can be predicted with good accuracy using a subsystem approach, in which the response functions of different units are coupled only at the dipolar level. We demonstrate this approach by comparison with previous time-dependent density functional theory calculations for fully coupled systems of Al nanoparticles and benzene molecules. While the present study only considers few-particle systems, the approach can be readily extended to much larger systems and to include explicit optical-cavity modes.

Original languageEnglish
Article number094109
Number of pages8
JournalJournal of Chemical Physics
Issue number9
Publication statusPublished - 7 Mar 2021
MoE publication typeA1 Journal article-refereed


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    Rossi, T.


    Project: Academy of Finland: Other research funding

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