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Extraordinary optoelectronic properties of van der Waals (vdW) heterostructures can be tuned via strain by mechanical deformation. So far, out-of-plane deformation and the resulting modification of the optical properties have been explored in transition metal dichalcogenides (TMDs) monolayers in visible region. Here, we demonstrate strong and localized luminescence in ultraviolet region from bubbles buried inside vdW multilayers of hexagonal boron nitride (hBN). As bubbles formed by vdW multilayers show distinct mechanical behavior compared to the case of a monolayer, we develop a comprehensive understanding of the bubble geometry and the thickness-dependent bending rigidity in vdW multilayers by combining theory and experiment. Additionally, we utilize the material confined within the bubbles to modify the bubble geometry under the electron beam irradiation, which results in the strong luminescence. Our results open a new route to design and modulate microscopic-scale optical cavities via strain engineering, which is of interest for both fundamental mechanical studies and optoelectronic applications.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Van der Waals heterostructures, luminescence, strain engineering

刊行年月日: 2022-08-25

出版者: Springer Science and Business Media LLC

掲載誌:

• Nature Communications (ISSN: 20411723) vol. 13 issue. 1 5000

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/s41467-022-32708-z

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更新時刻: 2025-02-27 08:30:59 +0900

MDRでの公開時刻: 2025-02-27 08:30:59 +0900