Nonlinear valley phonon scattering under the strong coupling regime

Xiaoze Liu; Jun Yi; Sui Yang; Erh-Chen Lin; Yue-Jiao Zhang; Peiyao Zhang; Jian-Feng Li; Yuan Wang; Yi-Hsien Lee; Zhong-Qun Tian; Xiang Zhang

doi:10.1038/s41563-021-00972-x

Nonlinear valley phonon scattering under the strong coupling regime

Xiaoze Liu, Jun Yi, Sui Yang, Erh-Chen Lin, Yue-Jiao Zhang, Peiyao Zhang, Jian-Feng Li, Yuan Wang, Yi-Hsien Lee, Zhong-Qun Tian, Xiang Zhang

Research output: Contribution to journal › Article › peer-review

42 Scopus citations

Abstract

Research efforts of cavity quantum electrodynamics have focused on the manipulation of matter hybridized with photons under the strong coupling regime1,2,3. This has led to striking discoveries including polariton condensation2 and single-photon nonlinearity3, where the phonon scattering plays a critical role1,2,3,4,5,6,7,8,9. However, resolving the phonon scattering remains challenging for its non-radiative complexity. Here we demonstrate nonlinear phonon scattering in monolayer MoS2 that is strongly coupled to a plasmonic cavity mode. By hybridizing excitons and cavity photons, the phonon scattering is equipped with valley degree of freedom and boosted with superlinear enhancement to a stimulated regime, as revealed by Raman spectroscopy and our theoretical model. The valley polarization is drastically enhanced and sustained throughout the stimulated regime, suggesting a coherent scattering process enabled by the strong coupling. Our findings clarify the feasibility of valley–cavity-based systems for lighting, imaging, optical information processing and manipulating quantum correlations in cavity quantum electrodynamics2,3,10,11,12,13,14,15,16,17.

Original language	English (US)
Journal	Nature Materials
DOIs	https://doi.org/10.1038/s41563-021-00972-x
State	Published - Apr 12 2021
Externally published	Yes

Bibliographical note

KAUST Repository Item: Exported on 2021-04-19
Acknowledged KAUST grant number(s): OSR-2016-CRG5-2996
Acknowledgements: This work was supported by the King Abdullah University of Science and Technology Office of Sponsored Research award OSR-2016-CRG5-2996, National Science Foundation MRI grant 1725335 and the Ernest S. Kuh Endowed Chair Professorship. X.L. also acknowledges support from the National Natural Science Foundation of China (grant nos 12074297 and 62005202). J.-F.L. acknowledges support from National Natural Science Foundation of China (grant no. 21925404) and National Key Research and Development Program of China (2019YFA0705400). Y.-H.L. acknowledges support from the Ministry of Science and Technology (MoST 109-2124-M-007-001-MY3; 108-2112-M-007-006-MY3; 107-2923-M-007-002-MY3), the Frontier Research Center on Fundamental and Applied Sciences of Matters and the Center for Quantum Technology of National Tsing-Hua University.
This publication acknowledges KAUST support, but has no KAUST affiliated authors.

ASJC Scopus subject areas

Mechanics of Materials
General Materials Science
General Chemistry
Mechanical Engineering
Condensed Matter Physics

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10.1038/s41563-021-00972-x

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title = "Nonlinear valley phonon scattering under the strong coupling regime",

abstract = "Research efforts of cavity quantum electrodynamics have focused on the manipulation of matter hybridized with photons under the strong coupling regime1,2,3. This has led to striking discoveries including polariton condensation2 and single-photon nonlinearity3, where the phonon scattering plays a critical role1,2,3,4,5,6,7,8,9. However, resolving the phonon scattering remains challenging for its non-radiative complexity. Here we demonstrate nonlinear phonon scattering in monolayer MoS2 that is strongly coupled to a plasmonic cavity mode. By hybridizing excitons and cavity photons, the phonon scattering is equipped with valley degree of freedom and boosted with superlinear enhancement to a stimulated regime, as revealed by Raman spectroscopy and our theoretical model. The valley polarization is drastically enhanced and sustained throughout the stimulated regime, suggesting a coherent scattering process enabled by the strong coupling. Our findings clarify the feasibility of valley–cavity-based systems for lighting, imaging, optical information processing and manipulating quantum correlations in cavity quantum electrodynamics2,3,10,11,12,13,14,15,16,17.",

author = "Xiaoze Liu and Jun Yi and Sui Yang and Erh-Chen Lin and Yue-Jiao Zhang and Peiyao Zhang and Jian-Feng Li and Yuan Wang and Yi-Hsien Lee and Zhong-Qun Tian and Xiang Zhang",

note = "KAUST Repository Item: Exported on 2021-04-19 Acknowledged KAUST grant number(s): OSR-2016-CRG5-2996 Acknowledgements: This work was supported by the King Abdullah University of Science and Technology Office of Sponsored Research award OSR-2016-CRG5-2996, National Science Foundation MRI grant 1725335 and the Ernest S. Kuh Endowed Chair Professorship. X.L. also acknowledges support from the National Natural Science Foundation of China (grant nos 12074297 and 62005202). J.-F.L. acknowledges support from National Natural Science Foundation of China (grant no. 21925404) and National Key Research and Development Program of China (2019YFA0705400). Y.-H.L. acknowledges support from the Ministry of Science and Technology (MoST 109-2124-M-007-001-MY3; 108-2112-M-007-006-MY3; 107-2923-M-007-002-MY3), the Frontier Research Center on Fundamental and Applied Sciences of Matters and the Center for Quantum Technology of National Tsing-Hua University. This publication acknowledges KAUST support, but has no KAUST affiliated authors.",

year = "2021",

month = apr,

day = "12",

doi = "10.1038/s41563-021-00972-x",

language = "English (US)",

journal = "Nature Materials",

issn = "1476-1122",

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T1 - Nonlinear valley phonon scattering under the strong coupling regime

AU - Liu, Xiaoze

AU - Yi, Jun

AU - Yang, Sui

AU - Lin, Erh-Chen

AU - Zhang, Yue-Jiao

AU - Zhang, Peiyao

AU - Li, Jian-Feng

AU - Wang, Yuan

AU - Lee, Yi-Hsien

AU - Tian, Zhong-Qun

AU - Zhang, Xiang

N1 - KAUST Repository Item: Exported on 2021-04-19 Acknowledged KAUST grant number(s): OSR-2016-CRG5-2996 Acknowledgements: This work was supported by the King Abdullah University of Science and Technology Office of Sponsored Research award OSR-2016-CRG5-2996, National Science Foundation MRI grant 1725335 and the Ernest S. Kuh Endowed Chair Professorship. X.L. also acknowledges support from the National Natural Science Foundation of China (grant nos 12074297 and 62005202). J.-F.L. acknowledges support from National Natural Science Foundation of China (grant no. 21925404) and National Key Research and Development Program of China (2019YFA0705400). Y.-H.L. acknowledges support from the Ministry of Science and Technology (MoST 109-2124-M-007-001-MY3; 108-2112-M-007-006-MY3; 107-2923-M-007-002-MY3), the Frontier Research Center on Fundamental and Applied Sciences of Matters and the Center for Quantum Technology of National Tsing-Hua University. This publication acknowledges KAUST support, but has no KAUST affiliated authors.

PY - 2021/4/12

Y1 - 2021/4/12

N2 - Research efforts of cavity quantum electrodynamics have focused on the manipulation of matter hybridized with photons under the strong coupling regime1,2,3. This has led to striking discoveries including polariton condensation2 and single-photon nonlinearity3, where the phonon scattering plays a critical role1,2,3,4,5,6,7,8,9. However, resolving the phonon scattering remains challenging for its non-radiative complexity. Here we demonstrate nonlinear phonon scattering in monolayer MoS2 that is strongly coupled to a plasmonic cavity mode. By hybridizing excitons and cavity photons, the phonon scattering is equipped with valley degree of freedom and boosted with superlinear enhancement to a stimulated regime, as revealed by Raman spectroscopy and our theoretical model. The valley polarization is drastically enhanced and sustained throughout the stimulated regime, suggesting a coherent scattering process enabled by the strong coupling. Our findings clarify the feasibility of valley–cavity-based systems for lighting, imaging, optical information processing and manipulating quantum correlations in cavity quantum electrodynamics2,3,10,11,12,13,14,15,16,17.

AB - Research efforts of cavity quantum electrodynamics have focused on the manipulation of matter hybridized with photons under the strong coupling regime1,2,3. This has led to striking discoveries including polariton condensation2 and single-photon nonlinearity3, where the phonon scattering plays a critical role1,2,3,4,5,6,7,8,9. However, resolving the phonon scattering remains challenging for its non-radiative complexity. Here we demonstrate nonlinear phonon scattering in monolayer MoS2 that is strongly coupled to a plasmonic cavity mode. By hybridizing excitons and cavity photons, the phonon scattering is equipped with valley degree of freedom and boosted with superlinear enhancement to a stimulated regime, as revealed by Raman spectroscopy and our theoretical model. The valley polarization is drastically enhanced and sustained throughout the stimulated regime, suggesting a coherent scattering process enabled by the strong coupling. Our findings clarify the feasibility of valley–cavity-based systems for lighting, imaging, optical information processing and manipulating quantum correlations in cavity quantum electrodynamics2,3,10,11,12,13,14,15,16,17.

UR - http://hdl.handle.net/10754/668813

UR - http://www.nature.com/articles/s41563-021-00972-x

U2 - 10.1038/s41563-021-00972-x

DO - 10.1038/s41563-021-00972-x

M3 - Article

C2 - 33846584

SN - 1476-1122

JO - Nature Materials

JF - Nature Materials

ER -

Nonlinear valley phonon scattering under the strong coupling regime

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