title: Design and experimental verification of terahertz wideband filter based on double-layered metal hole arrays.
abstract: A terahertz wideband filter based on double layer metal hole arrays is designed in this paper. A metal hole array is perforated on a metal layer with a square array of circular air holes. The transmission characteristics of the electromagnetic waves through the metal hole array can be determined by the accumulation of in-phase scattering, spoof surface plasmon polaritons, and waveguide modes. The transmission spectrum is tuned by adding another identical layer metal hole array, and a wideband filter can be formed accordingly. Samples containing double-layered metal hole arrays were fabricated by micromachining technology. A wideband filter with center frequency located at 0.8 THz and FWHM reaching 400 GHz was experimentally achieved.
authors.affiliation: Department of Information Science & Electronic Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Rao
authors.forename: Dongxiao
authors.initials: D
authors.lastname: Yang
authors.forename: Le
authors.initials: L
authors.lastname: Zhang
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.forename: Song
authors.initials: S
authors.lastname: Xia