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journal article·2024-08-21Open access

Organic Room-Temperature Polariton Condensate in a Higher-Order Topological Lattice

Christoph Bennenhei, Hangyong Shan, Marti Struve, Nils Kunte, Falk Eilenberger, Jürgen Ohmer, Utz Fischer, Stefan Schumacher, Xuekai Ma, Christian Schneider, Martin Esmann

ACS Photonics· Volume 11· Issue 8
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Source abstract

Abstract

Organic molecule exciton-polaritons in photonic lattices are a versatile platform to emulate unconventional phases of matter at ambient temperatures, including protected interface modes in topological insulators. Here, we investigate bosonic condensation in the most prototypical higher-order topological lattice: a 2D-version of the Su-Schrieffer-Heeger model. Under strong optical pumping, we observe bosonic condensation into both 0D and 1D topologically protected modes. The resulting 1D macroscopic quantum state reaches a coherent spatial extent of 10 μm, as evidenced by interferometric measurements of first order coherence. We account for the spatial mode patterns resulting from fluorescent protein-filled, structured microcavities by tight-binding calculations and theoretically characterize the topological invariants of the lattice. Our findings pave the way toward organic on-chip polaritonics using higher-order topology as a tool for the generation of robustly confined polaritonic lasing states.
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Research context

OpenAlex topics: Strong Light-Matter Interactions · Quantum and electron transport phenomena · Topological Materials and Phenomena

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Physics, School of Mathematics and Science, Carl von Ossietzky Universität Oldenburg, 26129 Oldenburg, Germany

Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, 07743 Jena, Germany

Fraunhofer-Institute for Applied Optics and Precision Engineering IOF, 07743 Jena, Germany

Max-Planck-School of Photonics, 07743 Jena, Germany

Department of Biochemistry, University of Würzburg, 97074 Würzburg, Germany

Department of Physics, Center for Optoelectronics and Photonics Paderborn (CeOPP), and Institute for Photonic Quantum Systems (PhoQS), Paderborn University, 33098 Paderborn, Germany

Funding

Carl von Ossietzky Universität Oldenburg · Bundesministerium für Bildung und Forschung · Niedersächsisches Ministerium für Wissenschaft und Kultur · Deutsche Forschungsgemeinschaft · European Social Fund Plus

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