Schlieren texture and topography induced confinement in an organic exciton-polariton laser

Florian Le Roux (), Andreas Mischok, Francisco Tenopala-Carmona and Malte C. Gather ()
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Florian Le Roux: University of Cologne
Andreas Mischok: University of Cologne
Francisco Tenopala-Carmona: University of Cologne
Malte C. Gather: University of Cologne

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract Non-linearities in organic exciton-polariton microcavities represent an attractive platform for quantum devices. However, progress in this area hinges on the development of material platforms for high-performance polariton lasing, scalable and sustainable fabrication, and ultimately strategies for electrical pumping. Here, we show how introducing Schlieren texturing and a rough intra-cavity topography in a liquid crystalline conjugated polymer enables strong in-plane confinement of polaritons and drastic enhancement of the lasing properties. In high-Q distributed Bragg reflector microcavities, polariton lasing was observed at unprecedented thresholds of 136 fJ per pulse. Morphology tuning also permitted polariton lasing in more lossy metallic microcavities while maintaining a competitive lasing threshold. The facile fabrication of these cavities will drastically reduce the complexity of integrating polariton lasers with other structures and the high conductivity of metallic mirrors may provide a route to electrical pumping.

Date: 2025
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DOI: 10.1038/s41467-025-55875-1

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