title: Phase change dispersion of plasmonic nano-objects.
abstract: Phase is an inherent and important feature for coherent processes, which, unfortunately, has not been completely understood for surface plasmon polariton (SPP) and matter interactions. Here we propose a practical approach to extract the phase change dispersion during the interaction between free-space light, SPPs and nanogroove/slit based on far-field information only. Numerical simulation and experimental validation were both presented using nanoslit-groove plasmonic interferometers, agreeing well with theoretical near-field analysis. This approach is generally feasible to extract the intrinsic phase dispersion of other plasmonic nanostructures and can reveal more fundamental features of SPP-matter interactions.
authors.affiliation: 1] Material Science Department, Fudan University, Shanghai, China 200433 [2] Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260.
authors.forename: Xie
authors.initials: X
authors.lastname: Zeng
authors.affiliation: College of Information Science and Engineering, Northeastern University, Shenyang 110819, China.
authors.forename: Haifeng
authors.initials: H
authors.lastname: Hu
authors.affiliation: Alcatel-Lucent Bell Labs, Murray Hill, NJ 07974.
authors.forename: Yongkang
authors.initials: Y
authors.lastname: Gao
authors.affiliation: Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260.
authors.forename: Dengxin
authors.initials: D
authors.lastname: Ji
authors.affiliation: Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260.
authors.forename: Nan
authors.initials: N
authors.lastname: Zhang
authors.affiliation: Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260.
authors.forename: Haomin
authors.initials: H
authors.lastname: Song
authors.affiliation: Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260.
authors.forename: Kai
authors.initials: K
authors.lastname: Liu
authors.affiliation: Material Science Department, Fudan University, Shanghai, China 200433.
authors.forename: Suhua
authors.initials: S
authors.lastname: Jiang
authors.affiliation: Department of Electrical Engineering, The State University of New York at Buffalo, Buffalo, NY 14260.
authors.forename: Qiaoqiang
authors.initials: Q
authors.lastname: Gan