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  Phonoritons as Hybridized Exciton-Photon-Phonon Excitations in a Monolayer h-BN Optical Cavity

Latini, S., de Giovannini, U., Sie, E. J., Gedik, N., Hübener, H., & Rubio, A. (2021). Phonoritons as Hybridized Exciton-Photon-Phonon Excitations in a Monolayer h-BN Optical Cavity. Physical Review Letters, 126(22): 227401. doi:10.1103/PhysRevLett.126.227401.

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PhysRevLett.126.227401.pdf (Publisher version), 837KB
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PhysRevLett.126.227401.pdf
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Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
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SI_Phonoriton.pdf (Supplementary material), 570KB
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The Supplementary Material contains a derivation of the phonoritonic Hamiltonian along with details on the first-principles calculations.
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https://arxiv.org/abs/2102.09472 (Preprint)
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 Creators:
Latini, S.1, 2, Author              
de Giovannini, U.1, 2, 3, Author              
Sie, E. J.4, 5, Author
Gedik, N.4, Author
Hübener, H.1, 2, Author              
Rubio, A.1, 2, 3, 6, Author              
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Center for Free Electron Laser Science, ou_persistent22              
3Nano-Bio Spectroscopy Group, Departamento de Fisica de Materiales, Universidad del Paìs Vasco UPV/EHU, ou_persistent22              
4Department of Physics, Massachusetts Institute of Technology, ou_persistent22              
5Geballe Laboratory for Advanced Materials, Stanford University, ou_persistent22              
6Center for Computational Quantum Physics (CCQ), The Flatiron Institute, ou_persistent22              

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 Abstract: A phonoriton is an elementary excitation that is predicted to emerge from hybridization between exciton, phonon, and photon. Besides the intriguing many-particle structure, phonoritons are of interest as they could serve as functional nodes in devices that utilize electronic, phononic, and photonic elements for energy conversion and thermal transport applications. Although phonoritons are predicted to emerge in an excitonic medium under intense electromagnetic wave irradiation, the stringent condition for their existence has eluded direct observation in solids. In particular, on-resonance, intense pumping schemes have been proposed, but excessive photoexcitation of carriers prevents optical detection. Here, we theoretically predict the appearance of phonoritonic features in monolayer hexagonal boron nitride (h-BN) embedded in an optical cavity. The coherent superposition nature of phonoriton states is evidenced by the hybridization of exciton-polariton branches with phonon replicas that is tunable by the cavity-matter coupling strength. This finding simultaneously provides an experimental pathway for observing the predicted phonoritons and opens a new avenue for tuning materials properties.

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Language(s): eng - English
 Dates: 2020-11-242021-04-022021-06-042021-06-04
 Publication Status: Published in print
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 Rev. Type: Peer
 Identifiers: arXiv: 2102.09472
DOI: 10.1103/PhysRevLett.126.227401
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Title: Physical Review Letters
  Abbreviation : Phys. Rev. Lett.
Source Genre: Journal
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Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: - Volume / Issue: 126 (22) Sequence Number: 227401 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: https://pure.mpg.de/cone/journals/resource/954925433406_1