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HL: Fachverband Halbleiterphysik

HL 46: Optical Properties

HL 46.4: Vortrag

Donnerstag, 20. März 2025, 10:30–10:45, H15

Room-temperature polariton condensate in a two-dimensional hybrid perovskite — •M. Struve¹, C. Bennenhei¹, H. P. Adl¹, K. W. Song², H. Shan¹, N. Mathukhno¹, J. Drawner¹, F. Eilenberg³, N. P. Jasti⁴, D. Cahen⁴, O. Kyriienko², C. Schneider¹, and M. Esmann¹ — ¹Institut for Physics, Carl von Ossietzky Universität Oldenburg — ²University Exeter, United Kingdom — ³Frauenhofer IOF, Jena — ⁴Weizmann Instutute of Science, Israel

Chemically synthesized 2D halide perovskites form naturally grown quantum well stacks. Their large binding energy, tunable emission spectra and high oscillator strength makes them promising platforms for room temperature polaritonics but bosonic condensation and polariton lasing at ambient conditions are yet to be shown. In this work we demonstrate cavity exciton-polariton condensation of 2D Ruddelson-Popper iodine perovskites (BA)₂(MA)₂Pb₃I₁₀ crystal at room temperature [1]. A polariton condensation threshold of P_th≈6.8 fJ with a strong non-linear response is observed. The emergence of spontaneous spatial coherence across the condensate with interferometric measurements is confirmed with a first-order autocorrelation reaching g⁽¹⁾≈0.6. With our results we lay the foundation for a new class of 2D halide perovskite based room-temperature polariton lasers that offer great potential for hetero-integration with other van-der-Waals materials and combination with photonic crystals. [1] M.Struve et al., arXiv 2024, https://doi.org/10.48550/arXiv.2408.13677

Keywords: Exciton Polariton; Perovskite; Polariton Laser