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Article: Tailoring MoS2 valley-polarized photoluminescence with super chiral near-field

TitleTailoring MoS<inf>2</inf> valley-polarized photoluminescence with super chiral near-field
Authors
KeywordsPhotoluminescence
Metasurface
MoS 2
Plasmon interactions
Exciton
Issue Date2018
Citation
Advanced Materials, 2018, v. 30, n. 34, article no. 1801908 How to Cite?
Abstract© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Transition metal dichalcogenides with intrinsic spin–valley degrees of freedom hold great potentials for applications in spintronic and val-leytronic devices. MoS 2 monolayer possesses two inequivalent valleys in the Brillouin zone, with each valley coupling selectively with circularly polarized photons. The degree of valley polarization (DVP) is a parameter to characterize the purity of valley-polarized photoluminescence (PL) of MoS 2 monolayer. Usually, the detected values of DVP in MoS 2 monolayer show achiral property under optical excitation of opposite helicities due to reciprocal phonon-assisted intervalley scattering process. Here, it is reported that valley-polarized PL of MoS 2 can be tailored through near-field interaction with plasmonic chiral metasurface. The resonant field of the chiral metasurface couples with valley-polarized excitons, and tailors the measured PL spectra in the far-field, resulting in observation of chiral DVP of MoS 2 -metasurface under opposite helicities excitations. Valley-contrast PL in the chiral heterostructure is also observed when illuminated by linearly polarized light. The manipulation of valley-polarized PL in 2D materials using chiral metasurface represents a viable route toward valley-polaritonic devices.
Persistent Identifierhttp://hdl.handle.net/10722/295094
ISSN
2023 Impact Factor: 27.4
2023 SCImago Journal Rankings: 9.191
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorLi, Ziwei-
dc.contributor.authorLiu, Changxu-
dc.contributor.authorRong, Xin-
dc.contributor.authorLuo, Yang-
dc.contributor.authorCheng, Haotian-
dc.contributor.authorZheng, Liheng-
dc.contributor.authorLin, Feng-
dc.contributor.authorShen, Bo-
dc.contributor.authorGong, Yongji-
dc.contributor.authorZhang, Shuang-
dc.contributor.authorFang, Zheyu-
dc.date.accessioned2021-01-05T04:59:03Z-
dc.date.available2021-01-05T04:59:03Z-
dc.date.issued2018-
dc.identifier.citationAdvanced Materials, 2018, v. 30, n. 34, article no. 1801908-
dc.identifier.issn0935-9648-
dc.identifier.urihttp://hdl.handle.net/10722/295094-
dc.description.abstract© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Transition metal dichalcogenides with intrinsic spin–valley degrees of freedom hold great potentials for applications in spintronic and val-leytronic devices. MoS 2 monolayer possesses two inequivalent valleys in the Brillouin zone, with each valley coupling selectively with circularly polarized photons. The degree of valley polarization (DVP) is a parameter to characterize the purity of valley-polarized photoluminescence (PL) of MoS 2 monolayer. Usually, the detected values of DVP in MoS 2 monolayer show achiral property under optical excitation of opposite helicities due to reciprocal phonon-assisted intervalley scattering process. Here, it is reported that valley-polarized PL of MoS 2 can be tailored through near-field interaction with plasmonic chiral metasurface. The resonant field of the chiral metasurface couples with valley-polarized excitons, and tailors the measured PL spectra in the far-field, resulting in observation of chiral DVP of MoS 2 -metasurface under opposite helicities excitations. Valley-contrast PL in the chiral heterostructure is also observed when illuminated by linearly polarized light. The manipulation of valley-polarized PL in 2D materials using chiral metasurface represents a viable route toward valley-polaritonic devices.-
dc.languageeng-
dc.relation.ispartofAdvanced Materials-
dc.subjectPhotoluminescence-
dc.subjectMetasurface-
dc.subjectMoS 2-
dc.subjectPlasmon interactions-
dc.subjectExciton-
dc.titleTailoring MoS<inf>2</inf> valley-polarized photoluminescence with super chiral near-field-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/adma.201801908-
dc.identifier.pmid29984556-
dc.identifier.scopuseid_2-s2.0-85050508484-
dc.identifier.volume30-
dc.identifier.issue34-
dc.identifier.spagearticle no. 1801908-
dc.identifier.epagearticle no. 1801908-
dc.identifier.eissn1521-4095-
dc.identifier.isiWOS:000442206400013-
dc.identifier.issnl0935-9648-

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