title: Artificial birefringent metallic planar structures for terahertz wave polarization manipulation.
abstract: We propose an artificial birefringent terahertz (THz) device constructed by subwavelength L-shaped hole arrays on a single metallic layer. This structure is able to work as a polarizer when the incident frequency is between the cut-off frequencies of two eigenmodes. When the incident wave is beyond cut-off frequencies of these two modes, it can be designed as an efficient half- or quarter-wave plate with extraordinary transmission properties. A big effective index difference from 0.254 to 0.768 is obtained using a subwavelength-thick planar structure, which can reduce the thickness of the device to one tenth of conventional quartz birefringent crystals for THz waves.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Suhua
authors.initials: S
authors.lastname: Jiang
authors.forename: Haifeng
authors.initials: H
authors.lastname: Hu
authors.forename: Haomin
authors.initials: H
authors.lastname: Song
authors.forename: Wei
authors.initials: W
authors.lastname: Zeng
authors.forename: Qiaoqiang
authors.initials: Q
authors.lastname: Gan