Strong Coupling in Bulk Nanoplasmonic Nanoplatelet Perovskite Scintillators
ABSTRACT Control of light emission underpins photonics and radiation detection. Strong coupling between excitons and confined electromagnetic modes forms light–matter states known as polaritons, enabling emission control. In scintillators, such effects have been investigated mainly in nanoscale architectures under optical excitation, limiting their relevance to bulk materials under ionizing radiation. Here, we demonstrate exciton–plasmon strong coupling in macroscopic CsPbBr 3 nanoplatelet/Ag nanocube‐PDMS composites under optical and X‐ray excitation. Nanocube‐size engineering and temperature tuning control detuning, producing spectral splitting and mode anticrossing for the 85 and 80 nm composites. Collective coupling strengths of about 90 and 98 meV exceed strong‐coupling thresholds, showing that hybridization remains observable in a bulk composite under X‐ray excitation. The average decay time shortens by up to (6.58 0.88) times. Following X‐ray irradiation, the same strongly coupled composites exhibit prolonged emission with average decay times of about 37 and 33 s, whereas this component is absent in the unresolved 75 nm composite and bare NPL reference. Spatially averaged electrodynamic analysis indicates that isolated‐CNP multilayer configurations cannot fully account for the collective interaction, highlighting the importance of strongly weighted local plasmonic environments. These results establish nanoscale plasmonic architecture as an additional design parameter for bulk scintillators.
Authors
- Liang Jie Wong (ORCID: https://orcid.org/0000-0002-9601-9456)
- Joanna Cybińska (ORCID: https://orcid.org/0000-0001-8753-7529)
- Christophe Dujardin (ORCID: https://orcid.org/0000-0002-0205-9837)
- Dennis R. Schaart (ORCID: https://orcid.org/0000-0002-3199-5608)
- Anna Pniakowska (ORCID: https://orcid.org/0000-0001-9314-1301)
- D. Hommel (ORCID: https://orcid.org/0000-0003-3425-8408)
- Michał Makowski (ORCID: https://orcid.org/0000-0001-7758-2326)
- Muhammad Danang Birowosuto (ORCID: https://orcid.org/0000-0002-9997-6841)
- Mohanad S. Eid (ORCID: https://orcid.org/0000-0002-5534-4084)
- Benoît Mahler (ORCID: https://orcid.org/0000-0001-5471-5608)
- Dominik Kowal (ORCID: https://orcid.org/0000-0001-9424-0416)
- Winicjusz Drozdowski (ORCID: https://orcid.org/0000-0002-6207-4801)
- Sergio Brovelli (ORCID: https://orcid.org/0000-0002-5993-855X)
- Kamil Misztal
Institutions
- Wrocław University of Science and Technology (PL)
- Nanyang Technological University (SG)
- Institut Universitaire de France (FR)
- Université de Lyon (FR)
- University of Wrocław (PL)
- Nicolaus Copernicus University (PL)
- Nedstack fuel cell technology (Netherlands) (NL)
- Istituto Nazionale di Fisica Nucleare, Sezione di Milano Bicocca (IT)
- Łukasiewicz Research Network – PORT Polish Center for Technology Development (PL)
- Singapore-MIT Alliance for Research and Technology (SG)
- University of Milano-Bicocca (IT)
- AGH University of Krakow (PL)
- Delft University of Technology (NL)
- Polish Academy of Sciences (PL)
Publication Details
- Journal
- Advanced Materials
- Published
- 2026-09-18
- DOI
- https://doi.org/10.1002/adma.75040
- Primary Topic
- Strong Light-Matter Interactions
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Narodowe Centrum Nauki
- Narodowym Centrum Nauki
- HORIZON EUROPE Innovative Europe