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HL: Fachverband Halbleiterphysik
HL 54: 2D Materials IX – Photonic properties and devices
HL 54.12: Vortrag
Freitag, 13. März 2026, 12:30–12:45, POT/0081
Room-temperature polariton condensate in a quasi-2D hybrid perovskite — M. Struve1, C. Bennenhei1, H. Pashaei Adl1, K.W. Song2, H. Shan1, N. Matukhno1, J.-C. Drawer1, S. Stephan1, F. Eilenberger3, N.P. Jasti4, D. Cahen4, O. Kyriienko5, C. Schneider1, and •M. Esmann1 — 1Carl von Ossietzky Universität Oldenburg — 2Xiamen University, Sepang, Malaysia — 3Frauenhofer IOF, Jena — 4Weizmann Institute of Science, Rehovot, Israel — 5University of Sheffield, UK
Quasi-2D halide perovskites are chemically synthesized quantum well stacks with large exciton oscillator strength and binding energy. Although promising for polaritonics, bosonic condensation and polariton lasing have so far remained elusive in quasi-2D perovskites at ambient conditions. Here, we demonstrate room-temperature cavity exciton-polariton condensation in mechanically exfoliated crystals of (BA)2(MA)2Pb3I10 in an in-situ tunable optical microcavity [1]. We observe a polariton condensation threshold of 0.41 µJcm−2 per pulse and detect a strong non-linear response. Interferometric measurements confirm the spontaneous emergence of spatial coherence across the polariton condensate. Our results lay the foundation for a new class of room-temperature polariton lasers based on quasi-2D halide perovskites with great potential for hetero-integration with other van-der-Waals materials, photonic crystals and waveguides.
[1] M. Struve et al. arXiv:2408.13677 (Nat. Comms. accepted 2025)
Keywords: 2D perovskites; cavity exciton-polariton; open optical microcavity; polariton condensation