title: Fluid-enabled significant enhancement and active tuning of magnetic resonances in free-standing plasmonic metamaterials.
abstract: We report significantly enhanced magnetic resonance by fluid infiltration in a free-standing metamaterial that consists of metal-dielectric-metal films on an ultrathin Si3N4 membrane patterned with etched through nanohole arrays. When different fluids are drop-casted on the structure, the magnetic resonance has high sensitivities of 282 nm per RIU in peak shift and 12% per RIU in peak intensity change, whereas the electric resonance has nearly no changes. This work shows a promising way of using fluids to actively tune the magnetic resonance of metamaterial structures by combining with micro/nano-fluidic technologies.
authors.affiliation: Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), 3 Research Link, Singapore 117602, Singapore. leonge@imre.a-star.edu.sg jh-teng@imre.a-star.edu.sg.
authors.forename: Eunice Sok Ping
authors.initials: ES
authors.lastname: Leong
authors.forename: Yan Jun
authors.initials: YJ
authors.lastname: Liu
authors.forename: Jie
authors.initials: J
authors.lastname: Deng
authors.forename: Yih Ting
authors.initials: YT
authors.lastname: Fong
authors.forename: Nan
authors.initials: N
authors.lastname: Zhang
authors.forename: Si Ji
authors.initials: SJ
authors.lastname: Wu
authors.forename: Jing Hua
authors.initials: JH
authors.lastname: Teng