Large-scale quantum-emitter arrays in atomically thin semiconductors

Carmen Palacios-Berraquero, Dhiren M. Kara, Alejandro R.-P. Montblanch, Matteo Barbone, Pawel Latawiec, Duhee Yoon, Anna K. Ott, Marko Loncar, Andrea C. Ferrari () and Mete Atatüre ()
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Carmen Palacios-Berraquero: Cavendish Laboratory, University of Cambridge
Dhiren M. Kara: Cavendish Laboratory, University of Cambridge
Alejandro R.-P. Montblanch: Cavendish Laboratory, University of Cambridge
Matteo Barbone: Cavendish Laboratory, University of Cambridge
Pawel Latawiec: John A. Paulson School of Engineering and Applied Science, Harvard University
Duhee Yoon: Cambridge Graphene Centre, University of Cambridge
Anna K. Ott: Cambridge Graphene Centre, University of Cambridge
Marko Loncar: John A. Paulson School of Engineering and Applied Science, Harvard University
Andrea C. Ferrari: Cambridge Graphene Centre, University of Cambridge
Mete Atatüre: Cavendish Laboratory, University of Cambridge

Nature Communications, 2017, vol. 8, issue 1, 1-6

Abstract: Abstract Quantum light emitters have been observed in atomically thin layers of transition metal dichalcogenides. However, they are found at random locations within the host material and usually in low densities, hindering experiments aiming to investigate this new class of emitters. Here, we create deterministic arrays of hundreds of quantum emitters in tungsten diselenide and tungsten disulphide monolayers, emitting across a range of wavelengths in the visible spectrum (610–680 nm and 740–820 nm), with a greater spectral stability than their randomly occurring counterparts. This is achieved by depositing monolayers onto silica substrates nanopatterned with arrays of 150-nm-diameter pillars ranging from 60 to 190 nm in height. The nanopillars create localized deformations in the material resulting in the quantum confinement of excitons. Our method may enable the placement of emitters in photonic structures such as optical waveguides in a scalable way, where precise and accurate positioning is paramount.

Date: 2017
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DOI: 10.1038/ncomms15093

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