title: Flexible transformation plasmonics using graphene.
abstract: The flexible control of surface plasmon polaritons (SPPs) is important and intriguing due to its wide application in novel plasmonic devices. Transformation optics (TO) offers the capability either to confine the SPP propagation on rigid curved/uneven surfaces, or to control the flow of SPPs on planar surfaces. However, TO has not permitted us to confine, manipulate, and control SPP waves on flexible curved surfaces. Here, we propose to confine and freely control flexible SPPs using TO and graphene. We show that SPP waves can be naturally confined and propagate on curved or uneven graphene surfaces with little bending and radiation losses, and the confined SPPs are further manipulated and controlled using TO. Flexible plasmonic devices are presented, including the bending waveguides, wave splitter, and Luneburg lens on curved surfaces. Together with the intrinsic flexibility, graphene can be served as a good platform for flexible transformation plasmonics.
authors.affiliation: State Key Laboratory of Millimeter waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China.
authors.forename: Wei Bing
authors.initials: WB
authors.lastname: Lu
authors.forename: Wei
authors.initials: W
authors.lastname: Zhu
authors.forename: Hong Ju
authors.initials: HJ
authors.lastname: Xu
authors.forename: Zhen Hua
authors.initials: ZH
authors.lastname: Ni
authors.forename: Zheng Gao
authors.initials: ZG
authors.lastname: Dong
authors.forename: Tie Jun
authors.initials: TJ
authors.lastname: Cui
mesh_terms: D017076:Computer-Aided Design; D055119:Elastic Modulus; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D007909:Lenses; D053758:Nanoparticles / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: D006108:Graphite