title: Dielectric-Like Behavior of Graphene in Au Plasmon Resonator.
abstract: Graphene has proven to be a promising conductive layer in fabricating optical plasmon resonators on insulator substrate using electron beam lithography and has the potential to construct electrically controlled active plasmon resonators. In this study, we investigate the effect of graphene on plasmon resonance using graphene and Au plasmon resonator system as a model at visible and near-infrared wavelength. Our experiment data show that the presence of graphene does not weaken and annihilate the plasmon resonance peaks, instead it predominantly makes the peaks redshift, which is similar to the behavior of depositing SiO2film on Au plasmon resonators. This fact indicates that graphene predominantly exhibits dielectric-like behavior at visible and near-infrared wavelength, which can be attributed to the low carrier density in graphene compared with metals.
authors.affiliation: Nanophotonics and Optoelectronics Research Center, Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing, 100094, China. liujunku@qxslab.cn.
authors.forename: Junku
authors.initials: J
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing, 100084, China. qunqli@mail.tsinghua.edu.cn.
authors.forename: Qunqing
authors.initials: Q
authors.lastname: Li
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing, 100084, China.
authors.forename: Mo
authors.initials: M
authors.lastname: Chen
authors.affiliation: The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, School of Physics and TEDA Applied Physics School, Nankai University, Tianjin, 300457, China.
authors.forename: Mengxin
authors.initials: M
authors.lastname: Ren
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing, 100084, China.
authors.forename: Lihui
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Nanophotonics and Optoelectronics Research Center, Qian Xuesen Laboratory of Space Technology, China Academy of Space Technology, Beijing, 100094, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Xiao
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing, 100084, China.
authors.forename: Kaili
authors.initials: K
authors.lastname: Jiang
authors.affiliation: State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics and Tsinghua-Foxconn Nanotechnology Research Center, Tsinghua University, Beijing, 100084, China.
authors.forename: Shoushan
authors.initials: S
authors.lastname: Fan
keywords: Dielectric-like behavior; Graphene; Plasmon resonator; SiO2 film