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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur
KFM 22: Perovskite and Photovoltaics II (joint session HL/KFM)
KFM 22.5: Talk
Thursday, March 21, 2024, 10:30–10:45, EW 203
Room temperature exciton-polaritons in quasi-2D Ruddlesden-Popper perovskites — •Hamid Pashaei Adl1,2, Christoph Bennenhei1, Jens Christian Drawer1, Lukas Lackner1, Marti Struve1, Anthony Ernzerhof1, Nadiya Matukhno1, Sigalit Aharon3, David Cahen3, Martin Esmann1, and Christian Schneider1 — 1Institute for Physics, Carl von Ossietzky University of Oldenburg, 26129 Oldenburg, Germany. — 2Instituto de Ciencia de Materiales (ICMUV) Universidad de ValenciaC/Catedrático José Beltrán, 2, Paterna E-46980, Spain. — 3Weizmann Institute of Science234 Herzl Street, Rehovot 7610001, Israel.
Ruddlesden-Popper (RP) layered perovskites [1] with high oscillator strength and large exciton binding energy are promising materials for photonic applications. The crystalline form of these perovskites can be used as excitonic medium in optical microcavities, allowing for the study of their optical properties in the strong light-matter coupling regime. Here, using angle resolved reflection spectroscopy, we show tunable strong coupling of light modes to mechanically exfoliated quasi-2D RP flakes in an open access microcavity under ambient conditions [2], which is supported by transfer matrix calculations. In ongoing experiments, we introduce structured photonic lattices to the open cavity to study the coupling of the polaritons to tailored topological features and investigate Bose-Einstein condensation.
[1] J. C. Blancon, et al., Nat Nanotechnology 15, 969 (2020). [2] L. Lackner, et al., Nat Commun 12, 4933 (2021).
Keywords: Quasi-2D Ruddlesden–Popper perovskites; Open access microcavity; Strong coupling; Exciton-Polaritons