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HL: Fachverband Halbleiterphysik
HL 62: 2D Semiconductors and van der Waals Heterostructures VII
HL 62.1: Vortrag
Freitag, 21. März 2025, 11:45–12:00, H15
Deterministic Purcell enhancement of single photon emission from a WSe2 monolayer quantum emitter — •Ivan Solovev1, Victor Mitryakhin1, Sven Stephan1,2, Jens-Christian Drawer1, Lukas Lackner1, Seth Tongay3, Kenji Watanabe4, Takashi Taniguchi5, Martin Esmann1, and Christian Schneider1 — 1Institute for Physics, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany — 2University of Applied Sciences Emden/Leer, Emden, Germany — 3Materials Science and Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona, USA — 4Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan — 5International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
Bright and easily fabricated quantum emitters in two-dimensional semiconductors have emerged as a promising platform for scalable quantum communication [1,2]. Here, we show, how their performance can be markedly elevated by integrating a monolayer into a versatile open plano-concave Fabry-Pérot microcavity. We managed to modulate radiative decay rate of a zero-phonon line by tuning a high Q-factor cavity. Reached five-fold shortening of the lifetime opens the route towards higher rates of quantum key distribution and generation of indistinguishable single photons in 2D semiconductors.
[1] J.C. Drawer et al., Nano Lett. 23 (18), 8683 (2023). [2] T. Gao et al. npj 2D Mater Appl 7, 4 (2023).
Keywords: Transition metal dichalcogenide monolayers; Microcavity; Purcell factor; Single photon emission; quantum emitter