| Autor: |
Palacios-Berraquero C; Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK., Kara DM; Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK., Montblanch AR; Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK., Barbone M; Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK.; Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, UK., Latawiec P; John A. Paulson School of Engineering and Applied Science, Harvard University, 29 Oxford Street, Cambridge, Massachusetts 02138, USA., Yoon D; Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, UK., Ott AK; Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, UK., Loncar M; John A. Paulson School of Engineering and Applied Science, Harvard University, 29 Oxford Street, Cambridge, Massachusetts 02138, USA., Ferrari AC; Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, UK., Atatüre M; Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, UK. |
| Abstrakt: |
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. |
