Coupling Single Photons from Discrete Quantum Emitters in WSe2 to Lithographically Defined Plasmonic Slot Waveguides

Nano Letters
M BlauthM Kaniber

Abstract

We report the observation of the generation and routing of single plasmons generated by localized excitons in a WSe2 monolayer flake exfoliated onto lithographically defined Au-plasmonic waveguides. Statistical analysis of the position of different quantum emitters shows that they are (3.3 ± 0.7) times more likely to form close to the edges of the plasmonic waveguides. By characterizing individual emitters, we confirm their single-photon character via the observation of antibunching in the signal ( g(2)(0) = 0.42) and demonstrate that specific emitters couple to modes of the proximal plasmonic waveguide. Time-resolved measurements performed on emitters close to and far away from the plasmonic nanostructures indicate that Purcell factors up to 15 ± 3 occur, depending on the precise location of the quantum emitter relative to the tightly confined plasmonic mode. Measurement of the point spread function of five quantum emitters relative to the waveguide with <50 nm precision is compared with numerical simulations to demonstrate the potential for greater increases in the coupling efficiency for ideally positioned emitters. The integration of such strain-induced quantum emitters with deterministic plasmonic routing is a step toward ...Continue Reading

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Citations

Dec 28, 2018·Proceedings of the National Academy of Sciences of the United States of America·A P BurgersH J Kimble
Jan 9, 2020·Nature Communications·Jose J FonsecaJeremy T Robinson
Feb 23, 2020·Nano Letters·Christian Schörner, Markus Lippitz
Nov 14, 2019·Nano Letters·U Celano, N Maccaferri
Apr 23, 2019·Nano Letters·Christian SchörnerMarkus Lippitz
Sep 6, 2019·Nano Letters·Oliver IffChristian Schneider
Jul 7, 2021·Reports on Progress in Physics·Wenliang WangGuoqiang Li
Jan 4, 2022·Nano Letters·Marko M PetrićJonathan J Finley

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