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Design of van der Waals interfaces for broad-spectrum optoelectronics

Ubrig, Nicolas; Ponomarev, Evgeniy; Zultak, Johanna; Domaretskiy, Daniil; Z�lyomi, Viktor; Terry, Daniel; Howarth, James; Guti�rrez-Lezama, Ignacio; Zhukov, Alexander; Kudrynskyi, Zakhar R.; Kovalyuk, Zakhar D; Patan�, Amalia; Taniguchi, Takashi; Watanabe, Kenji; Gorbachev, Roman V; Fal'ko, Vladimir I; Morpurgo, Alberto F

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Authors

Nicolas Ubrig

Evgeniy Ponomarev

Johanna Zultak

Daniil Domaretskiy

Viktor Z�lyomi

Daniel Terry

James Howarth

Ignacio Guti�rrez-Lezama

Alexander Zhukov

ZAKHAR KUDRYNSKYI ZAKHAR.KUDRYNSKYI@NOTTINGHAM.AC.UK
Nottingham Research Anne Mclaren Fellows

Zakhar D Kovalyuk

Takashi Taniguchi

Kenji Watanabe

Roman V Gorbachev

Vladimir I Fal'ko

Alberto F Morpurgo



Abstract

Van der Waals (vdW) interfaces based on 2D materials are promising for optoelectronics, as interlayer transitions between different compounds allow tailoring of the spectral response over a broad range. However, issues such as lattice mismatch or a small misalignment of the constituent layers can drastically suppress electron–photon coupling for these interlayer transitions. Here, we engineered type-II interfaces by assembling atomically thin crystals that have the bottom of the conduction band and the top of the valence band at the Γ point, and thus avoid any momentum mismatch. We found that these van der Waals interfaces exhibit radiative optical transitions irrespective of the lattice constant, the rotational and/or translational alignment of the two layers or whether the constituent materials are direct or indirect gap semiconductors. Being robust and of general validity, our results broaden the scope of future optoelectronics device applications based on two-dimensional materials.

Citation

Ubrig, N., Ponomarev, E., Zultak, J., Domaretskiy, D., Zólyomi, V., Terry, D., …Morpurgo, A. F. (2020). Design of van der Waals interfaces for broad-spectrum optoelectronics. Nature Materials, 19, 299-304. https://doi.org/10.1038/s41563-019-0601-3

Journal Article Type Article
Acceptance Date Dec 20, 2019
Online Publication Date Feb 3, 2020
Publication Date 2020-03
Deposit Date Jan 6, 2020
Publicly Available Date Mar 29, 2024
Journal Nature Materials
Print ISSN 1476-1122
Electronic ISSN 1476-4660
Publisher Nature Publishing Group
Peer Reviewed Peer Reviewed
Volume 19
Pages 299-304
DOI https://doi.org/10.1038/s41563-019-0601-3
Keywords Mechanical Engineering; General Materials Science; Mechanics of Materials; General Chemistry; Condensed Matter Physics
Public URL https://nottingham-repository.worktribe.com/output/3676205
Publisher URL https://www.nature.com/articles/s41563-019-0601-3

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