Deterministic coupling of quantum emitters in WSe2 monolayers to plasmonic nanocavities

Oliver Iff, Nils Lundt, Simon Betzold, Laxmi Narayan Tripathi, Monika Emmerling, Sefaattin Tongay, Young Jin Lee, Soon Hong Kwon, Sven Höfling, Christian Schneider

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13 Scopus citations

Abstract

We discuss coupling of site-selectively induced quantum emitters in exfoliated monolayers of WSe2 to plasmonic nanostructures. Gold nanorods of 20 nm-240 nm size, which are arranged in pitches of a few micrometers on a dielectric surface, act as seeds for the formation of quantum emitters in the atomically thin materials. We observe characteristic narrow-band emission signals from the monolayers, which correspond well with the positions of the metallic nanopillars with and without thin dielectric coating. Single photon emission from the emitters is confirmed by autocorrelation measurements, yielding g2(τ = 0) values as low as 0.17. Moreover, we observe a strong co-polarization of our single photon emitters with the frequency matched plasmonic resonances, as a consequence of light-matter coupling. Our work represents a significant step towards the scalable implementation of coupled quantum emitter-resonator systems for highly integrated quantum photonic and plasmonic applications.

Original languageEnglish (US)
Pages (from-to)25944-25951
Number of pages8
JournalOptics Express
Volume26
Issue number20
DOIs
StatePublished - Oct 1 2018

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Iff, O., Lundt, N., Betzold, S., Tripathi, L. N., Emmerling, M., Tongay, S., Lee, Y. J., Kwon, S. H., Höfling, S., & Schneider, C. (2018). Deterministic coupling of quantum emitters in WSe2 monolayers to plasmonic nanocavities. Optics Express, 26(20), 25944-25951. https://doi.org/10.1364/OE.26.025944