title: Near-unity transparency of a continuous metal film via cooperative effects of double plasmonic arrays.
abstract: Metal structures with high optical transparency and conductivity are of great importance for practical applications in optoelectronic devices. Here we investigate the transparency response of a continuous metal film sandwiched by double plasmonic nanoparticle arrays. The upper nanoparticle array shows efficient light trapping of the incident field, acting as a light input coupler, and the lower nanoparticle array shows a light release gate opening at the other side, acting as the light output coupler. The strong near-field light-matter interactions of the nano-scale separated plasmonic nanoparticles, the excitation of surface plasmon waves of the metal film, and their cooperative coupling effects result in broadband scattering cancellation and near-unity transparency (up to 96%) in the optical regime. The transparency response in such a structure can be efficiently modified by varying the gap distance of adjacent nanoparticles, dielectric environments, and the distance between the plasmonic array and the metal film. This motif may provide a new alternative approach to obtain transparent and highly conducting metal structures with potential applications in transparent conductors, plasmonic filters, and highly integrated light input and output components.
authors.affiliation: College of Physics and Communication Electronics, Provincial Key Laboratory of Optoelectronic and Telecommunication, Jiangxi Normal University, Nanchang, People's Republic of China.
authors.forename: Zheng-qi
authors.initials: ZQ
authors.lastname: Liu
authors.forename: Gui-qiang
authors.initials: GQ
authors.lastname: Liu
authors.forename: Hai-qing
authors.initials: HQ
authors.lastname: Zhou
authors.forename: Xiao-shan
authors.initials: XS
authors.lastname: Liu
authors.forename: Kuan
authors.initials: K
authors.lastname: Huang
authors.forename: Yuan-hao
authors.initials: YH
authors.lastname: Chen
authors.forename: Guo-lan
authors.initials: GL
authors.lastname: Fu