title: Manipulation of photoluminescence of two-dimensional MoSe2 by gold nanoantennas.
abstract: Monolayer molybdenum diselenide (MoSe2), a member of the TMDCs family, is an appealing candidate for coupling to gold plasmonic nanostructures as it has smaller bandgap and higher electron mobility in comparison to frequently studied molybdenum disulfide (MoS2). The PL of MoSe2 occurs in the near-infrared spectral range where the emissive properties do not suffer from the enhanced dissipation in the gold due to inter-band transitions. Here, we study the interaction between monolayer MoSe2 and plasmonic dipolar antennas in resonance with the PL emission of MoSe2. By varying the thickness of the spacer between the MoSe2 layer and nanoantenna, we demonstrate manipulation of the PL intensity from nearly fourfold quenching to approximately threefold enhancement. Furthermore, we show that the coupled TMDC-nanoantenna system exhibits strong polarization-dependent PL, thus offering the possibility of polarization-based emission control. Our experimental results are supported by numerical simulations as well. To the best of our knowledge, this is the first study of Au-MoSe2 plasmonic hybrid structures realizing flexible PL manipulation.
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Haitao
authors.initials: H
authors.lastname: Chen
authors.affiliation: Research School of Engineering, College of Engineering and Computer Science, Australian National University, Canberra, ACT 0200, Australia.
authors.forename: Jiong
authors.initials: J
authors.lastname: Yang
authors.affiliation: Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.
authors.forename: Evgenia
authors.initials: E
authors.lastname: Rusak
authors.affiliation: Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.
authors.forename: Jakob
authors.initials: J
authors.lastname: Straubel
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Rui
authors.initials: R
authors.lastname: Guo
authors.affiliation: Research School of Engineering, College of Engineering and Computer Science, Australian National University, Canberra, ACT 0200, Australia.
authors.forename: Ye Win
authors.initials: YW
authors.lastname: Myint
authors.affiliation: Research School of Engineering, College of Engineering and Computer Science, Australian National University, Canberra, ACT 0200, Australia.
authors.forename: Jiajie
authors.initials: J
authors.lastname: Pei
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Manuel
authors.initials: M
authors.lastname: Decker
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Isabelle
authors.initials: I
authors.lastname: Staude
authors.affiliation: Institute of Theoretical Solid State Physics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.|Institute of Nanotechnology, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany.
authors.forename: Carsten
authors.initials: C
authors.lastname: Rockstuhl
authors.affiliation: Research School of Engineering, College of Engineering and Computer Science, Australian National University, Canberra, ACT 0200, Australia.
authors.forename: Yuerui
authors.initials: Y
authors.lastname: Lu
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar
authors.affiliation: Nonlinear Physics Centre, Research School of Physics and Engineering, Australian National University, Canberra, ACT 2601, Australia.
authors.forename: Dragomir
authors.initials: D
authors.lastname: Neshev