A1 Journal article (refereed)
Weak and strong coupling properties of surface excitons (2024)

Dutta, A., & Toppari, J. J. (2024). Weak and strong coupling properties of surface excitons. Physical Review B, 109(16), Article 165117. https://doi.org/10.1103/PhysRevB.109.165117

JYU authors or editors

Publication details

All authors or editors: Dutta, Arpan; Toppari, J. Jussi

Journal or series: Physical Review B

ISSN: 2469-9950

eISSN: 2469-9969

Publication year: 2024

Publication date: 05/04/2024

Volume: 109

Issue number: 16

Article number: 165117

Publisher: American Physical Society (APS)

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1103/PhysRevB.109.165117

Publication open access: Not open

Publication channel open access: 

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/94631

Abstract

With high enough doping concentrations, organic dye–doped polymer materials exhibit a negative real part of the permittivity within an energy range just above their material absorption, incurring surface exciton (SE) modes at these energies. Here, we report on how such modes can be used to realize strong light-matter coupling with photoactive molecules. Our simulations reveal that SEs can facilitate strong coupling by sustaining the energy-splitting-induced transparency; however, the polaritons may not be visible in the absorption since they can easily be located outside of the narrow negative permittivity regime. Moreover, we show that the SE modes cannot couple strongly with the surface plasmons. Our findings shed light on the weak and strong coupling properties of SEs.

Keywords: polymers; nanostructures; optical properties; surface phenomena; quasiparticles

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Ministry reporting: Yes

Reporting Year: 2024

Preliminary JUFO rating: 2