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  Programmable hyperbolic polaritons in van der Waals semiconductors

Sternbach, A. J., Chae, S. H., Latini, S., Rikhter, A. A., Shao, Y., Li, B., et al. (2021). Programmable hyperbolic polaritons in van der Waals semiconductors. Science, 371(6529), 617-620. doi:10.1126/science.abe9163.

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Supplementary Materials: Materials and Methods, Supplementary Text, Figs. S1 to S6, Tables S1 and S2, References
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https://dx.doi.org/10.1126/science.abe9163 (Publisher version)
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 Creators:
Sternbach, A. J.1, Author
Chae, S. H.2, Author
Latini, S.3, Author              
Rikhter, A. A.4, Author
Shao, Y.1, Author
Li, B.2, Author
Rhodes, D.2, Author
Kim, B.2, Author
Schuck, P. J.2, Author
Xu, X.5, Author
Zhu, X.-Y.6, Author
Averitt, R. D.4, Author
Hone, J.2, Author
Fogler, M. M.4, Author
Rubio, A.3, 7, Author              
Basov, D. N.1, Author
Affiliations:
1Department of Physics, Columbia University, New York, ou_persistent22              
2Department of Mechanical Engineering, Columbia University, New York, ou_persistent22              
3Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
4Department of Physics, University of California–San Diego, ou_persistent22              
5Department of Physics, University of Washington, Seattle, ou_persistent22              
6Department of Chemistry, Columbia University, New York, ou_persistent22              
7Center for Computational Quantum Physics (CCQ), Flatiron Institute, New York, ou_persistent22              

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 Abstract: Collective electronic modes or lattice vibrations usually prohibit propagation of electromagnetic radiation through the bulk of common materials over a frequency range associated with these oscillations. However, this textbook tenet does not necessarily apply to layered crystals. Highly anisotropic materials often display nonintuitive optical properties and can permit propagation of subdiffractional waveguide modes, with hyperbolic dispersion, throughout their bulk. Here, we report on the observation of optically induced electronic hyperbolicity in the layered transition metal dichalcogenide tungsten diselenide (WSe2). We used photoexcitation to inject electron-hole pairs in WSe2 and then visualized, by transient nanoimaging, the hyperbolic rays that traveled along conical trajectories inside of the crystal. We establish here the signatures of programmable hyperbolic electrodynamics and assess the role of quantum transitions of excitons within the Rydberg series in the observed polaritonic response.

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Language(s): eng - English
 Dates: 2020-09-242020-12-222021-02-042021-02-05
 Publication Status: Published in print
 Pages: 4
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1126/science.abe9163
 Degree: -

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Title: Science
  Abbreviation : Science
Source Genre: Journal
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Publ. Info: Washington, D.C. : American Association for the Advancement of Science
Pages: - Volume / Issue: 371 (6529) Sequence Number: - Start / End Page: 617 - 620 Identifier: ISSN: 0036-8075
CoNE: https://pure.mpg.de/cone/journals/resource/991042748276600_1