title: Microwave birefringent metamaterials for polarization conversion based on spoof surface plasmon polariton modes.
abstract: We propose the design of wideband birefringent metamaterials based on spoof surface plasmon polaritons (SSPPs). Spatial k-dispersion design of SSPP modes in metamaterials is adopted to achieve high-efficiency transmission of electromagnetic waves through the metamaterial layer. By anisotropic design, the transmission phase accumulation in metamaterials can be independently modulated for x- and y-polarized components of incident waves. Since the dispersion curve of SSPPs is nonlinear, frequency-dependent phase differences can be obtained between the two orthogonal components of transmitted waves. As an example, we demonstrate a microwave birefringent metamaterials composed of fishbone structures. The full-polarization-state conversions on the zero-longitude line of Poincaré sphere can be fulfilled twice in 6-20 GHz for both linearly polarized (LP) and circularly polarized (CP) waves incidence. Besides, at a given frequency, the full-polarization-state conversion can be achieved by changing the polarization angle of the incident LP waves. Both the simulation and experiment results verify the high-efficiency polarization conversion functions of the birefringent metamaterial, including circular-to-circular, circular-to-linear(linear-to-circular), linear-to-linear polarization conversions.
authors.affiliation: College of Science, Air Force Engineering University, Xi,an 710051, People's Republic of China.
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Li
authors.affiliation: College of Science, Air Force Engineering University, Xi,an 710051, People's Republic of China.
authors.forename: Jieqiu
authors.initials: J
authors.lastname: Zhang
authors.affiliation: College of Science, Air Force Engineering University, Xi,an 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 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 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 710051, People's Republic of China.
authors.forename: Dayi
authors.initials: D
authors.lastname: Feng
authors.affiliation: Electronic Materials Research Laboratory, Key Laboratory of Ministry of Education, Xi'an Jiao-tong University, Xi'an 710049, People's Republic of China.
authors.forename: Zhuo
authors.initials: Z
authors.lastname: Xu
authors.affiliation: College of Science, Air Force Engineering University, Xi,an 710051, People's Republic of China.
authors.forename: Shaobo
authors.initials: S
authors.lastname: Qu