Strong and tunable interlayer coupling of infrared-active phonons to excitons in van der Waals heterostructures

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Du, Luojun Zhao, Yanchong Jia, Zhiyan Liao, Mengzhou Wang, Qinqin Guo, Xiangdong Shi, Zhiwen Yang, Rong Watanabe, Kenji Taniguchi, Takashi Xiang, Jianyong Shi, Dongxia Dai, Qing Sun, Zhipei Zhang, Guangyu 2019-06-20T13:12:41Z 2019-06-20T13:12:41Z 2019-05-10
dc.identifier.citation Du , L , Zhao , Y , Jia , Z , Liao , M , Wang , Q , Guo , X , Shi , Z , Yang , R , Watanabe , K , Taniguchi , T , Xiang , J , Shi , D , Dai , Q , Sun , Z & Zhang , G 2019 , ' Strong and tunable interlayer coupling of infrared-active phonons to excitons in van der Waals heterostructures ' Physical Review B , vol. 99 , no. 20 , 205410 . en
dc.identifier.issn 2469-9950
dc.identifier.issn 2469-9969
dc.identifier.other PURE UUID: 1d9087f6-8404-4d9f-be1b-d415e5cd05b6
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
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dc.description.abstract Understanding and manipulating the quantum interlayer exciton-phonon coupling in van der Waals heterostructures, especially for infrared active phonons with electromagnetic fields, would set a foundation for realizing exotic quantum phenomena and optoelectronic applications. Here we report experimental observations of strong mutual interactions between infrared active phonons in hexagonal boron nitride (hBN) and excitons in WS2. Our results underscore that the infrared active A2u mode of hBN becomes Raman active with strong intensities in WS2/hBN heterostructures through resonant coupling to the B exciton of WS2. Moreover, we demonstrate that the activated A2u phonon of hBN can be tuned by the hBN thickness and harbors a striking anticorrelation intensity modulation, as compared with the optically silent B1g mode. Our observation of the interlayer exciton-infrared active phonon interactions and their evolution with hBN thickness provide a firm basis for engineering the hyperbolic exciton-phonon polaritons, chiral phonons and fascinating nanophotonics based on van der Waals heterostructures. en
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher American Physical Society
dc.relation.ispartofseries Physical Review B en
dc.relation.ispartofseries Volume 99, issue 20 en
dc.rights openAccess en
dc.subject.other Electronic, Optical and Magnetic Materials en
dc.subject.other Condensed Matter Physics en
dc.subject.other 221 Nanotechnology en
dc.title Strong and tunable interlayer coupling of infrared-active phonons to excitons in van der Waals heterostructures en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Electronics and Nanoengineering
dc.contributor.department Chinese Academy of Sciences
dc.contributor.department Yanshan University
dc.contributor.department National Center for Nanoscience and Technology Beijing
dc.contributor.department Shanghai Jiao Tong University
dc.contributor.department National Institute for Materials Science Tsukuba
dc.subject.keyword VALLEY POLARIZATION
dc.subject.keyword MONOLAYER MOS2
dc.subject.keyword BORON-NITRIDE
dc.subject.keyword POLARITONS
dc.subject.keyword GRAPHENE
dc.subject.keyword TRANSPORT
dc.subject.keyword MODES
dc.subject.keyword WS2
dc.subject.keyword Electronic, Optical and Magnetic Materials
dc.subject.keyword Condensed Matter Physics
dc.subject.keyword 221 Nanotechnology
dc.identifier.urn URN:NBN:fi:aalto-201906203868
dc.identifier.doi 10.1103/PhysRevB.99.205410
dc.type.version publishedVersion

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