SKM 2021 – scientific programme
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DS: Fachverband Dünne Schichten
DS 2: 2D materials and their heterostructures (joint session DS/CPP/HL)
DS 2.3: Talk
Monday, September 27, 2021, 11:45–12:00, H3
Gate-Switchable Arrays of Quantum Light Emitters in Contacted Monolayer MoS2 van der Waals Heterodevices — •Alexander Hötger1,2, Julian Klein1,2,3,4, Katja Barthelmi1,3, Lukas Sigl1,2, Samuel Gyger5, Takashi Taniguchi6, Kenji Watanabe6, Val Zwiller5, Klaus D. Jöns5, Ursula Wurstbauer2,7, Jonathan Finley1,2,3, and Alexander Holleitner1,2,3 — 1Walter Schottky Institut, TU Munich — 2Exzellenzcluster e-conversion — 3Munich Center for Quantum Science and Technology — 4Massachusetts Institute of Technology, Cambridge — 5KTH Royal Institute of Technology, Dept. of Applied Physics — 6National Institute for Materials Science, Tsukuba — 7Institute of Physics, Westfälische Wilhelms-Universität Münster
Controlling single-photon emission on a few nanometers plays an important role for the scalability of future quantum photonic circuits. Moreover, it is highly relevant to facilitate a gate-switchable emission for quantum information schemes. By irradiating MoS2 with helium ions, we generate single-photon sources at ∼1.75 eV with a lateral position accuracy of only a few nanometers. [1] Second-order correlation measurements unambiguously proof the nature of single-photon emission. Charge doping of the monolayer MoS2 can be used for switching the quantum emission on and off. [2] This deterministic control of light emission in spatial and temporal means paves the way for new integrated quantum photonic technologies.
[1] J. Klein, L. Sigl et al., ACS Photonics 8, 2 (2021).
[2] A. Hötger et al., Nano Lett. 21, 2 (2021).