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  Enhanced tunable second harmonic generation from twistable interfaces and vertical superlattices in boron nitride homostructures

Yao, K., Finney, N. R., Zhang, J., Moore, S. L., Xian, L. D., Tancogne-Dejean, N., et al. (2021). Enhanced tunable second harmonic generation from twistable interfaces and vertical superlattices in boron nitride homostructures. Science Advances, 7(10): eabe8691. doi:10.1126/sciadv.abe8691.

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This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
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© The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.
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Supplementary material: Sections S1 to S9, Figs. S1 to S13, References
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https://arxiv.org/abs/2006.13802 (Preprint)
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https://dx.doi.org/10.1126/sciadv.abe8691 (Verlagsversion)
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 Urheber:
Yao, K.1, Autor
Finney, N. R.1, Autor
Zhang, J.2, Autor           
Moore, S. L.3, Autor
Xian, L. D.2, Autor           
Tancogne-Dejean, N.2, Autor           
Liu, F.4, Autor
Ardelean, J.1, Autor
Xu, X.1, Autor
Halbertal, D.3, Autor
Watanabe, K.5, Autor
Taniguchi, T.6, Autor
Ochoa, H.3, Autor
Asenjo-Garcia, A.3, Autor
Zhu, X.4, Autor
Basov, D. N.3, Autor
Rubio, A.2, 7, Autor           
Dean, C. R.3, Autor
Hone, J.1, Autor
Schuck, P. J.1, Autor
Affiliations:
1Department of Mechanical Engineering, Columbia University, New York, ou_persistent22              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
3Department of Physics, Columbia University, New York, ou_persistent22              
4Department of Chemistry, Columbia University, New York, ou_persistent22              
5Research Center for Functional Materials, National Institute for Materials Science, ou_persistent22              
6International Center for Materials Nanoarchitectonics, National Institute for Materials Science, ou_persistent22              
7Center for Computational Quantum Physics, Simons Foundation Flatiron Institute, New York, ou_persistent22              

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 Zusammenfassung: Broken symmetries induce strong even-order nonlinear optical responses in materials and at interfaces. Unlike conventional covalently bonded nonlinear crystals, van der Waals (vdW) heterostructures feature layers that can be stacked at arbitrary angles, giving complete control over the presence or lack of inversion symmetry at a crystal interface. Here, we report highly tunable second harmonic generation (SHG) from nanomechanically rotatable stacks of bulk hexagonal boron nitride (BN) crystals and introduce the term twistoptics to describe studies of optical properties in twistable vdW systems. By suppressing residual bulk effects, we observe SHG intensity modulated by a factor of more than 50, and polarization patterns determined by moiré interface symmetry. Last, we demonstrate greatly enhanced conversion efficiency in vdW vertical superlattice structures with multiple symmetry-broken interfaces. Our study paves the way for compact twistoptics architectures aimed at efficient tunable frequency conversion and demonstrates SHG as a robust probe of buried vdW interfaces.

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Sprache(n): eng - English
 Datum: 2020-09-182021-01-192021-03-03
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: arXiv: 2006.13802
DOI: 10.1126/sciadv.abe8691
 Art des Abschluß: -

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Projektname : -
Grant ID : 886291
Förderprogramm : Horizon 2020 (H2020)
Förderorganisation : European Commission (EC)
Projektname : This research is mainly supported as part of Programmable Quantum Materials, an Energy Frontier Research Center funded by the U.S. Department of Energy (DOE), Office of Science, Basic Energy Sciences (BES), under award DE-SC0019443. Theory support involving DFT calculations for this project is supported by the European Research Council (ERC-2015-AdG694097), the Cluster of Excellence AIM, and the Max Planck Institute–New York City Center for Non-Equilibrium Quantum Phenomena (A.R.). The Flatiron Institute is a division of the Simons Foundation. N.F. acknowledges support from the Stewardship Science Graduate Fellowship program provided under cooperative agreement number DE-NA0003864. K.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan (grant number JPMXP0112101001), JSPS KAKENHI (grant number JP20H00354), and the CREST (JPMJCR15F3), JST. J.Z. acknowledges funding received from the European Union Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement 886291 (PeSD-NeSL).
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Quelle 1

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Titel: Science Advances
  Andere : Sci. Adv.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington : AAAS
Seiten: - Band / Heft: 7 (10) Artikelnummer: eabe8691 Start- / Endseite: - Identifikator: ISSN: 2375-2548
CoNE: https://pure.mpg.de/cone/journals/resource/2375-2548