Tunable Room‐Temperature Polaritons in the Very Strong Coupling Regime in Quasi‐2D Ruddlesden–Popper Perovskites

Abstract Layered perovskites are an emergent class of materials, which feature extraordinarily large light–matter coupling, driven by excitons with binding energies significantly beyond the thermal energy at room‐temperature. In this work, widely tunable room‐temperature cavity exciton polaritons are demonstrated at the cross‐over from the strong coupling to the very strong coupling regime in mechanically exfoliated crystals of quasi‐2D Ruddlesden–Popper iodide perovskite (BA) 2 (MA) 2 Pb 3 I 10 embedded in an open microcavity. The coupled exciton‐cavity system features a Rabi‐splitting up to Ω R ≃155 meV, exceeding the experimentally determined exciton binding energy of E b = 100 ± 10 meV and thus operates at the onset of the very strong coupling regime, in which the light–matter coupling alters the interaction of electron and hole. This combined experimental‐theoretical effort provides a consistent microscopic picture successfully describing the observed peculiar scaling of the Rabi‐splitting with an increasing effective cavity length. These findings provide a foundation for future on‐chip applications involving tunable polaritonic and nonlinear optical devices based on strongly coupled perovskite systems.

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Publication Details

Journal
Advanced Optical Materials
Published
2025-09-16
DOI
https://doi.org/10.1002/adom.202501392
Primary Topic
Perovskite Materials and Applications
Type
article
Field-Weighted Citation Impact
0.00

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article

Tunable Room‐Temperature Polaritons in the Very Strong Coupling Regime in Quasi‐2D Ruddlesden–Popper Perovskites

Martin Esmann, Michał Baranowski, Christian Schneider, Moritz Gittinger et al.
Advanced Optical Materials
Perovskite Materials and Applications
article

Tunable Room‐Temperature Polaritons in the Very Strong Coupling Regime in Quasi‐2D Ruddlesden–Popper Perovskites

Martin Esmann, Michał Baranowski, Christian Schneider, Moritz Gittinger, Christoph Lienau, Kok Wee Song, Ermin Malić, Jonas K. König, Oleksandr Kyriienko, Jamie M. Fitzgerald, Paulina Peksa, Marti Struve, Hamid Pashaei Adl, Paulina Płochocka, Mateusz Dyksik, Falk Eilenberger, Christoph Bennenhei, Naga Prathibha Jasti
article en

Abstract

Abstract Layered perovskites are an emergent class of materials, which feature extraordinarily large light–matter coupling, driven by excitons with binding energies significantly beyond the thermal energy at room‐temperature. In this work, widely tunable room‐temperature cavity exciton polaritons are demonstrated at the cross‐over from the strong coupling to the very strong coupling regime in mechanically exfoliated crystals of quasi‐2D Ruddlesden–Popper iodide perovskite (BA) 2 (MA) 2 Pb 3 I 10 embedded in an open microcavity. The coupled exciton‐cavity system features a Rabi‐splitting up to Ω R ≃155 meV, exceeding the experimentally determined exciton binding energy of E b = 100 ± 10 meV and thus operates at the onset of the very strong coupling regime, in which the light–matter coupling alters the interaction of electron and hole. This combined experimental‐theoretical effort provides a consistent microscopic picture successfully describing the observed peculiar scaling of the Rabi‐splitting with an increasing effective cavity length. These findings provide a foundation for future on‐chip applications involving tunable polaritonic and nonlinear optical devices based on strongly coupled perovskite systems.

Advanced Optical MaterialsVol. 13(30)
Wrocław University of Science and Technology (PL), Centre National de la Recherche Scientifique (FR), Carl von Ossietzky Universität Oldenburg (DE), Jawaharlal Nehru Centre for Advanced Scientific Research (IN), Philipps University of Marburg (DE), Parc Científic de la Universitat de València (ES), Laboratoire National des Champs Magnétiques Intenses (FR), Fraunhofer Institute for Applied Optics and Precision Engineering (DE), Xiamen University Malaysia (MY), Weizmann Institute of Science (IL), AGH University of Krakow (PL), Friedrich Schiller University Jena (DE), Université Grenoble Alpes (FR), University of Sheffield (GB)
Carl von Ossietzky Universität Oldenburg, Deutsche Forschungsgemeinschaft, Universitat de València, Xiamen University, Niedersächsisches Ministerium für Wissenschaft und Kultur, Engineering and Physical Sciences Research Council
Openalex Percentile: Top 75%
Perovskite Materials and Applications
DOIOpen Access PDFOpenAlex
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