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Spatially-resolved UV-C emission in epitaxial monolayer boron nitride

Rousseau, A.; Plo, J; Plo, Juliette; Valvin, Pierre; Cheng, Tin S; Bradford, Jonathan; James, Tyler Saunders Socrates; Wrigley, James; Mellor, Chris J; Beton, Peter H; Novikov, Sergei V; Jacques, Vincent; Gil, Bernard; Cassabois, Guillaume

Spatially-resolved UV-C emission in epitaxial monolayer boron nitride Thumbnail


Authors

A. Rousseau

J Plo

Juliette Plo

Pierre Valvin

TIN CHENG Tin.Cheng@nottingham.ac.uk
Research Fellow

James Wrigley

PETER BETON peter.beton@nottingham.ac.uk
Professor of Physics

Vincent Jacques

Bernard Gil

Guillaume Cassabois



Abstract

We report hyperspectral imaging in the UV-C spectral domain in epitaxial monolayers of hexagonal boron nitride (hBN). Under quasi-resonant laser excitation, the UV-C emission of monolayer hBN consists in resonant Raman scattering and photoluminescence, which appear to be spatially uncorrelated. Systematic measurements as a function of the excitation energy bring evidence of a photoluminescence singlet at ∼6.045 eV. The spatial variations of the photoluminescence energy are found to be around ∼10 meV, revealing that the inhomogeneous broadening is lower than the average photoluminescence linewidth of ∼25 meV, a value close to the radiative limit in monolayer hBN. Our methodology provides an accurate framework for assessing the opto-electronic properties of hBN in the prospect of scalable hBN-based devices fabricated by epitaxy.

Citation

Rousseau, A., Plo, J., Plo, J., Valvin, P., Cheng, T. S., Bradford, J., James, T. S. S., Wrigley, J., Mellor, C. J., Beton, P. H., Novikov, S. V., Jacques, V., Gil, B., & Cassabois, G. (2024). Spatially-resolved UV-C emission in epitaxial monolayer boron nitride. 2D Materials, 11(2), Article 025026. https://doi.org/10.1088/2053-1583/ad2f45

Journal Article Type Article
Acceptance Date Mar 1, 2024
Online Publication Date Mar 13, 2024
Publication Date 2024-04
Deposit Date Mar 19, 2024
Publicly Available Date Mar 19, 2024
Journal 2D Materials
Electronic ISSN 2053-1583
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 11
Issue 2
Article Number 025026
DOI https://doi.org/10.1088/2053-1583/ad2f45
Keywords Boron nitride, photoluminescence, monolayer, ultraviolet
Public URL https://nottingham-repository.worktribe.com/output/32179172

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Publisher Licence URL
https://creativecommons.org/licenses/by/4.0/

Copyright Statement
© 2024 The Author(s). Published by IOP Publishing Ltd
Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.




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