SKM 2023 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 7: Organic Semiconductors (joint session HL/CPP)
CPP 7.6: Talk
Monday, March 27, 2023, 11:00–11:15, POT 251
Room-temperature polariton lasing in anisotropic optical microcavities — •Christoph Bennenhei1, Nils Kunte1, Marti Struve1, Heiko Knopf2, Falk Eilenberger2, Jürgen Ohmer3, Utz Fischer3, Martin Esmann1, and Christian Schneider1 — 1Institute for Physics, Universität Oldenburg, Germany — 2Fraunhofer-Institute for Applied Optics and Precision Engineering IOF, Jena, Germany — 3Department of Biochemistry, Universität Würzburg, Germany
Organic molecule exciton-polaritons in artificial photonic potentials are an emerging platform to emulate electronic Hamiltonians at ambient conditions and for realizing low-threshold microlasers. In this work, we probe the polarization of polariton lasing in microcavities composed of dielectric Bragg reflectors with anisotropic indentations, enclosing the fluorescent protein mCherry. This material has been previously presented as a promising material for room-temperature polariton condensation [1,2]. Here, we experimentally show that lasing above the threshold differs distinctly for the two linearly polarized, energetically non-degenerate cavity eigenmodes. This effect leads to a drastic increase in the degree of linear polarization for the coherent photoluminescence emitted from the cavity. Our devices have relevant applications both for new types of polarized coherent light sources on chip and for accessing additional degrees of freedom in the emulation of topological electronic lattice Hamiltonians at room temperature.
[1] S. Betzold et al. ACS Photonics 7, 384 (2020).
[2] M. Dusel et al. Nano Lett. 21, 6398 (2021).