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Zotev, P.G., Wang, Y., Sortino, L. et al. (8 more authors) (2022) Transition metal dichalcogenide dimer nanoantennas for tailored light–matter interactions. ACS Nano, 16 (4). pp. 6493-6505. ISSN 1936-0851
Abstract
Transition metal dichalcogenides have emerged as promising materials for nanophotonic resonators because of their large refractive index, low absorption within a large portion of the visible spectrum, and compatibility with a wide range of substrates. Herein, we use these properties to fabricate WS2 double-pillar nanoantennas in a variety of geometries enabled by the anisotropy in the crystal structure. Using dark-field spectroscopy, we reveal multiple Mie resonances, to which we couple WSe2 monolayer photoluminescence and achieve Purcell enhancement and an increased fluorescence by factors up to 240 for dimer gaps of 150 nm. We introduce postfabrication atomic force microscope repositioning and rotation of dimer nanoantennas, achieving gaps as small as 10 ± 5 nm, which enables a host of potential applications, including strong Purcell enhancement of single-photon emitters and optical trapping, which we study in simulations. Our findings highlight the advantages of using transition metal dichalcogenides for nanophotonics by exploring applications enabled by their properties.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 American Chemical Society. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (https://creativecommons.org/licenses/by/4.0/). |
Keywords: | nanophotonics; Mie resonators; transition metal dichalcogenides; photoluminescence enhancement; Purcell enhancement; optical trapping |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/P026850/1 ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/S030751/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 28 Apr 2022 13:16 |
Last Modified: | 20 Jan 2023 17:15 |
Status: | Published |
Publisher: | American Chemical Society (ACS) |
Refereed: | Yes |
Identification Number: | 10.1021/acsnano.2c00802 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:186104 |
Available Versions of this Item
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Transition metal dichalcogenide dimer nano-antennas with ultra-small gaps. (deposited 20 Jan 2023 17:14)
- Transition metal dichalcogenide dimer nanoantennas for tailored light–matter interactions. (deposited 28 Apr 2022 13:16) [Currently Displayed]