Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime

Abstract Over the past few decades, exciton-polaritons have attracted substantial research interest due to their half-light-half-matter bosonic nature. Coupling exciton-polaritons with magnetic orders grants access to rich many-body phenomena, but has been limited by the availability of material sys...

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Main Authors: Tingting Wang, Dingyang Zhang, Shiqi Yang, Zhongchong Lin, Quan Chen, Jinbo Yang, Qihuang Gong, Zuxin Chen, Yu Ye, Wenjing Liu
Format: Article
Language:English
Published: Nature Portfolio 2023-09-01
Series:Nature Communications
Online Access:https://doi.org/10.1038/s41467-023-41688-7
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author Tingting Wang
Dingyang Zhang
Shiqi Yang
Zhongchong Lin
Quan Chen
Jinbo Yang
Qihuang Gong
Zuxin Chen
Yu Ye
Wenjing Liu
author_facet Tingting Wang
Dingyang Zhang
Shiqi Yang
Zhongchong Lin
Quan Chen
Jinbo Yang
Qihuang Gong
Zuxin Chen
Yu Ye
Wenjing Liu
author_sort Tingting Wang
collection DOAJ
description Abstract Over the past few decades, exciton-polaritons have attracted substantial research interest due to their half-light-half-matter bosonic nature. Coupling exciton-polaritons with magnetic orders grants access to rich many-body phenomena, but has been limited by the availability of material systems that exhibit simultaneous exciton resonances and magnetic ordering. Here we report magnetically-dressed microcavity exciton-polaritons in the van der Waals antiferromagnetic (AFM) semiconductor CrSBr coupled to a Tamm plasmon microcavity. Using angle-resolved spectroscopy, we reveal an exceptionally high exciton-photon coupling strength, up to 169 meV, demonstrating ultrastrong coupling that persists up to room temperature. By performing temperature-dependent spectroscopy, we show the magnetic nature of the exciton-polaritons in CrSBr microcavity as the magnetic order changes from AFM to paramagnetic. By applying an out-of-plane magnetic field, we achieve effective tuning of the polariton energy while maintaining the ultrastrong exciton-photon coupling strength. We attribute this to the spin canting process that modulates the interlayer exciton interaction.
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spelling doaj.art-bf59b8ae53c34cb0a810b633ac38a2442023-11-20T10:12:36ZengNature PortfolioNature Communications2041-17232023-09-011411710.1038/s41467-023-41688-7Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regimeTingting Wang0Dingyang Zhang1Shiqi Yang2Zhongchong Lin3Quan Chen4Jinbo Yang5Qihuang Gong6Zuxin Chen7Yu Ye8Wenjing Liu9State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking UniversityState Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking UniversityState Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking UniversityState Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking UniversitySchool of Semiconductor Science and Technology, South China Normal UniversityState Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking UniversityState Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking UniversitySchool of Semiconductor Science and Technology, South China Normal UniversityState Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking UniversityState Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics, School of Physics, Peking UniversityAbstract Over the past few decades, exciton-polaritons have attracted substantial research interest due to their half-light-half-matter bosonic nature. Coupling exciton-polaritons with magnetic orders grants access to rich many-body phenomena, but has been limited by the availability of material systems that exhibit simultaneous exciton resonances and magnetic ordering. Here we report magnetically-dressed microcavity exciton-polaritons in the van der Waals antiferromagnetic (AFM) semiconductor CrSBr coupled to a Tamm plasmon microcavity. Using angle-resolved spectroscopy, we reveal an exceptionally high exciton-photon coupling strength, up to 169 meV, demonstrating ultrastrong coupling that persists up to room temperature. By performing temperature-dependent spectroscopy, we show the magnetic nature of the exciton-polaritons in CrSBr microcavity as the magnetic order changes from AFM to paramagnetic. By applying an out-of-plane magnetic field, we achieve effective tuning of the polariton energy while maintaining the ultrastrong exciton-photon coupling strength. We attribute this to the spin canting process that modulates the interlayer exciton interaction.https://doi.org/10.1038/s41467-023-41688-7
spellingShingle Tingting Wang
Dingyang Zhang
Shiqi Yang
Zhongchong Lin
Quan Chen
Jinbo Yang
Qihuang Gong
Zuxin Chen
Yu Ye
Wenjing Liu
Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime
Nature Communications
title Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime
title_full Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime
title_fullStr Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime
title_full_unstemmed Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime
title_short Magnetically-dressed CrSBr exciton-polaritons in ultrastrong coupling regime
title_sort magnetically dressed crsbr exciton polaritons in ultrastrong coupling regime
url https://doi.org/10.1038/s41467-023-41688-7
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