title: Strong Exciton-Plasmon Coupling in MoS2 Coupled with Plasmonic Lattice.
abstract: We demonstrate strong exciton-plasmon coupling in silver nanodisk arrays integrated with monolayer MoS2 via angle-resolved reflectance microscopy spectra of the coupled system. Strong exciton-plasmon coupling is observed with the exciton-plasmon coupling strength up to 58 meV at 77 K, which also survives at room temperature. The strong coupling involves three types of resonances: MoS2 excitons, localized surface plasmon resonances (LSPRs) of individual silver nanodisks and plasmonic lattice resonances of the nanodisk array. We show that the exciton-plasmon coupling strength, polariton composition, and dispersion can be effectively engineered by tuning the geometry of the plasmonic lattice, which makes the system promising for realizing novel two-dimensional plasmonic polaritonic devices.
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Physics and Astronomy, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Wenjing
authors.initials: W
authors.lastname: Liu
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Physics and Astronomy, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Bumsu
authors.initials: B
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Physics and Astronomy, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Carl H
authors.initials: CH
authors.lastname: Naylor
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Physics and Astronomy, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Ho-Seok
authors.initials: HS
authors.lastname: Ee
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Physics and Astronomy, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Joohee
authors.initials: J
authors.lastname: Park
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Physics and Astronomy, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: A T Charlie
authors.initials: AT
authors.lastname: Johnson
authors.affiliation: Department of Materials Science and Engineering and ‡Department of Physics and Astronomy, University of Pennsylvania , Philadelphia, Pennsylvania 19104, United States.
authors.forename: Ritesh
authors.initials: R
authors.lastname: Agarwal
keywords: MoS2; plasmonic lattice; plexciton; polariton; strong coupling