SKM 2021 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 3: Poster Session I
HL 3.7: Poster
Monday, September 27, 2021, 10:00–13:00, P
single-photon emission and coherence properties of quantum emitters in WSe2 monolayers — Martin von Helversen1, •Bárbara Rosa1, Chirag Palekar1, Carlos Antón-Solanas2, Christian Schneider3, and Stephan Reitzenstein1 — 1Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany — 2Institute of Physics,Carl von Ossietzky University, Oldenburg, Germany — 3Institute of Physics, University of Oldenburg, Oldenburg, Germany
Two-dimensional van der Waals monolayers have arisen as a new plat-form for exploring optical, electronic, and structural properties of semi-conducting materials. Among several unique features of transitionmetal dichalcogenides, the ability of manipulating one or few atomiclayers play an important role in providing a potential two-level single photon emitters (SPEs) by engineering of strain [1,2] or defects [2]. In this work, we explore the quantum properties of SPEs in strained WSe2monolayers [1]. By conducting off- and quasi-resonant optical excitation at cryogenic temperatures, we identify emitters with linewidth sas low as 70 /mueV. Furthermore, throughout second order auto-correlation measurements we observe a multi-photon suppression by achieving g(2)(0) = 0.05(5). Lastly, we investigate the first order of coherence in SPEs WSe2 when performing scanning Michelson interferometer experiments.
[1] L. N. Tripathi, et al.ACS Photonics8, 5, 1919-1926 (2018).
[2] K. Parto et al.Nat Commun.12, 3585 (2021).