title: Spatial k-dispersion engineering of spoof surface plasmon polaritons for customized absorption.
abstract: Absorption of electromagnetic waves in a medium is generally manipulated by controlling the frequency dispersion of constitutive parameters. However, it is still challenging to gain the desired constitutive parameters for customized absorption over a broad frequency range. Here, by virtue of spoof surface plasmonic polaritons (SPPs), we demonstrate capabilities of the spatial k-dispersion engineering for producing the customized broadband absorption. Incident waves can be efficiently converted to the spoof SPPs by plasmonic arrays, and their propagation and/or absorption can be controlled by engineering the spatial dispersion of k-vector. Based on this feature, we show how such concept is employed to achieve broadband as well as frequency-selective broadband absorptions as examples. It is expected that the proposed concept can be extended to other manipulations of propagating electromagnetic waves over a broad frequency range.
authors.affiliation: School of Electronics &Information Engineering, Xi'an Jiaotong University, Xi'an, Shanxi 710049, People's Republic of China.|College of Science, Air Force Engineering University, Xi'an, Shaanxi 710051, People's Republic of China.
authors.forename: Yongqiang
authors.initials: Y
authors.lastname: Pang
authors.affiliation: College of Science, Air Force Engineering University, Xi'an, Shaanxi 710051, People's Republic of China.
authors.forename: Jiafu
authors.initials: J
authors.lastname: Wang
authors.affiliation: College of Science, Air Force Engineering University, Xi'an, Shaanxi 710051, People's Republic of China.
authors.forename: Hua
authors.initials: H
authors.lastname: Ma
authors.affiliation: College of Science, Air Force Engineering University, Xi'an, Shaanxi 710051, People's Republic of China.
authors.forename: Mingde
authors.initials: M
authors.lastname: Feng
authors.affiliation: College of Science, Air Force Engineering University, Xi'an, Shaanxi 710051, People's Republic of China.
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Li
authors.affiliation: School of Electronics &Information Engineering, Xi'an Jiaotong University, Xi'an, Shanxi 710049, People's Republic of China.
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Xu
authors.affiliation: School of Electronics &Information Engineering, Xi'an Jiaotong University, Xi'an, Shanxi 710049, People's Republic of China.
authors.forename: Song
authors.initials: S
authors.lastname: Xia
authors.affiliation: College of Science, Air Force Engineering University, Xi'an, Shaanxi 710051, People's Republic of China.
authors.forename: Shaobo
authors.initials: S
authors.lastname: Qu