Phonoritons as Hybridized Exciton-Photon-Phonon Excitations in a Monolayer h -BN Optical Cavity
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PhysRevLett.126.227401.pdf
Description
Published version
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836.36 KB
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cbf80b60d392fc5681562d134ac1d881
Author(s)
Latini, Simone
De Giovannini, Umberto
Sie, Edbert J
Gedik, Nuh
Hübener, Hannes
Rubio, Angel
Date Issued
2021
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Latini, Simone, De Giovannini, Umberto, Sie, Edbert J, Gedik, Nuh, Hübener, Hannes et al. 2021. "Phonoritons as Hybridized Exciton-Photon-Phonon Excitations in a Monolayer h -BN Optical Cavity." Physical Review Letters, 126 (22).
Version
Final published version
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1103/PHYSREVLETT.126.227401
