Berlin 2024 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 43: Optical Properties II

HL 43.1: Talk

Thursday, March 21, 2024, 09:30–09:45, EW 561

Polarized room-temperature polariton lasing in elliptical microcavities filled with fluorescent proteins — •Marti Struve¹, Christoph Bennenhei¹, Sven Stephan^1,2, Nils Kunte¹, Victor N. Mitryakhin¹, Falk Eilenberger³, Jürgen Ohmer⁴, Utz Fischer⁴, Martin Silies², Christian Schneider¹, and Martin Esmann¹ — ¹Institute for Physics, Carl von Ossietzky University of Oldenburg, Germany — ²University of Applied Sciences Emden/Leer, Germany — ³Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena — ⁴Department of Biochemistry, University of Würzburg, Germany

Excitons in organic semiconductors can couple strongly to cavity photons forming exciton polaritons at ambient conditions. In artificial photonic potentials they are an emerging platform to study polariton lasing and Bose-Einstein condensation [1,2]. In this work, we study the polarization properties of fluorescent proteins enclosed by distributed Bragg reflectors with elliptical indentations [3]. We show experimentally and numerically that the structural anisotropy of the elliptical potential and the internal TE-TM splitting of dielectric Bragg reflectors leads to a distinct polarization splitting. This splitting enforces condensation into one polaritonic mode with linear polarization. Our devices have relevant applications for the engineering and tuning of polarization in room temperature polariton lasers through additional degrees of freedom. References [1] S. Betzold et al. ACS Photonics 7, 384 (2020). [2] M. Dusel et al. Nano Lett. 21, 6398 (2021). [3] C. Bennenhei, M. Struve et al. Opt. Mater. Express 13, 2633 (2023).

Keywords: Strong coupling; exciton polariton; Microcavity; fluoresent protein; polarization engineering