Berlin 2024 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
HL: Fachverband Halbleiterphysik
HL 2: 2D Materials and Heterostructures: Photonic Aspects
HL 2.6: Talk
Monday, March 18, 2024, 10:45–11:00, EW 201
Second-order temporal coherence of polariton lasers based on an atomically thin crystal in a microcavity — •Hangyong Shan1, Jens-Christian Drawer1, Meng Sun2, Carlos Anton-Solanas5, Martin Esmann1, Kentaro Yumigeta6, Sefaattin Tongay6, Sven Höfling4, Ivan Savenko3, and Christian Schneider1 — 1Oldenburg University, Oldenburg, Germany — 2Beijing University of Technology, Beijing, China — 3Guangdong Technion Israel Institute of Technology, Shantou, China — 4Würzburg University, Würzburg, Germany — 5Universidad Autónoma de Madrid, Madrid, Spain — 6Arizona State University, Arizona, USA
Bosonic condensation and lasing of exciton-polaritons in microcavities is a fascinating solid-state phenomenon. Here, we study the photon statistics via the second-order temporal coherence of polariton lasing emerging from an optical microcavity integrated with an atomically thin MoSe2 crystal. In our experiments, we observe distinct polariton dispersions and characteristic features of bosonic lasing. With the utility of Hanbury Brown and Twiss (HBT) setup, we investigate macroscopic polariton phase transition for varying excitation powers and temperatures. The lower-polariton exhibits photon bunching below the threshold, implying a dominant thermal distribution of the emission, while above the threshold, the second-order correlation transits towards unity, which evidences the formation of a coherent state. Our findings are in agreement with a microscopic numerical model based on the Lindblad master equation, which explicitly includes scattering with phonons on the quantum level.
Keywords: Exciton-polaritons; Polariton lasing; Second-order temporal coherence; MoSe2 semiconductor; Optical microcavity