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  Femtosecond exciton dynamics in WSe2 optical waveguides

Sternbach, A. J., Latini, S., Chae, S., Hübener, H., de Giovannini, U., Shao, Y., et al. (2020). Femtosecond exciton dynamics in WSe2 optical waveguides. Nature Communications, 11(1): 3567. doi:10.1038/s41467-020-17335-w.

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Datensatz-Permalink: https://hdl.handle.net/21.11116/0000-0006-D010-C Versions-Permalink: https://hdl.handle.net/21.11116/0000-0006-D011-B
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This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
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Sternbach, A. J.1, Autor
Latini, S.2, Autor           
Chae, S.3, Autor
Hübener, H.2, Autor           
de Giovannini, U.2, Autor           
Shao, Y.1, Autor
Xiong, L.1, Autor
Sun, Z.1, Autor
Shi, N.1, Autor
Kissin, P.4, Autor
Ni, G.-X.1, Autor
Rhodes, D.3, Autor
Kim, B.3, Autor
Yu, N.1, Autor
Millis, A. J.1, Autor
Fogler, M. M.4, Autor
Schuck, P. J.3, Autor
Lipson, M.5, Autor
Zhu, X.-Y.6, Autor
Hone, J.3, Autor
Averitt, R. D.4, AutorRubio, A.2, 7, Autor           Basov, D. N.1, Autor mehr..
Affiliations:
1Department of Physics, 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 Mechanical Engineering, Columbia University, New York, ou_persistent22              
4Department of Physics, University of California, San Diego, ou_persistent22              
5Department of Electrical Engineering, Columbia University, New York, ou_persistent22              
6Department of Chemistry, Columbia University, New York, ou_persistent22              
7Center for Computational Quantum Physics (CCQ), Flatiron Institute, ou_persistent22              

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 Zusammenfassung: Van-der Waals (vdW) atomically layered crystals can act as optical waveguides over a broad range of the electromagnetic spectrum ranging from Terahertz to visible. Unlike common Si-based waveguides, vdW semiconductors host strong excitonic resonances that may be controlled using non-thermal stimuli including electrostatic gating and photoexcitation. Here, we utilize waveguide modes to examine photo-induced changes of excitons in the prototypical vdW semiconductor, WSe2, prompted by femtosecond light pulses. Using time-resolved scanning near-field optical microscopy we visualize the electric field profiles of waveguide modes in real space and time and extract the temporal evolution of the optical constants following femtosecond photoexcitation. By monitoring the phase velocity of the waveguide modes, we detect incoherent A-exciton bleaching along with a coherent optical Stark shift in WSe2.

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Sprache(n): eng - English
 Datum: 2020-04-232020-06-172020-07-16
 Publikationsstatus: Online veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1038/s41467-020-17335-w
 Art des Abschluß: -

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Titel: Nature Communications
  Kurztitel : Nat. Commun.
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: London : Nature Publishing Group
Seiten: - Band / Heft: 11 (1) Artikelnummer: 3567 Start- / Endseite: - Identifikator: ISSN: 2041-1723
CoNE: https://pure.mpg.de/cone/journals/resource/2041-1723