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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 5: 2D Materials I (joint session HL/CPP)
CPP 5.2: Talk
Monday, March 27, 2023, 09:45–10:00, POT 81
A bright single-photon source based on a WSe2 monolayer in an open cavity — •Victor Mitryakhin1, Hangyong Shan1, Jens-Christian Drawer1, Sven Stephan1, Martin Silies2, Falk Eilenberger3, Carlos Antón-Solanas1, Martin Esmann1, and Christian Schneider1 — 1Carl von Ossietzky Universität Oldenburg, 26129 Oldenburg, Germany — 2Hochschule Emden/Leer, 26723 Emden, Germany — 3Friedrich-Schiller-Universität Jena, 07745 Jena, Germany
Single photon sources based on crystalline defects present in transition-metal dichalcogenide monolayers, 2D atomically thin direct-bandgap semiconductors, have recently emerged as a promising platform for realization of and use in quantum communication and information processing.
In this work, we investigate the properties of single photon emission from a single exciton in a WSe2 monolayer weakly coupled to an asymmetric plano-concave microcavity consisting of freely movable mirrors in 3 directions. In this regard, it enables us for an in-situ control of the properties of the emission and the extraction efficiency of single photons in the device.
We report a highly bright and linearly polarized single photon source with source brightness exceeding 70 % under saturation conditions, polarization degree of 98.4±1.3 % and high photon purity noted by the second-order correlation g(2)(0) value of 0.047±0.007, measured in Hanbury-Brown-Twist type of a setup.