title: Freely tunable broadband polarization rotator for terahertz waves.
abstract: A freely tunable polarization rotator for broadband terahertz waves is demonstrated using a three-rotating-layer metallic grating structure, which can conveniently rotate the polarization of a linearly polarized terahertz wave to any desired direction with nearly perfect conversion efficiency. This low-cost, high-efficiency, and freely tunable device has potential applications as material analysis, wireless communication, and THz imaging.
authors.affiliation: National Laboratory of Solid State Microstructures and School of Physics, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
authors.forename: Ren-Hao
authors.initials: RH
authors.lastname: Fan
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhou
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Ren
authors.forename: Ru-Wen
authors.initials: RW
authors.lastname: Peng
authors.forename: Shang-Chi
authors.initials: SC
authors.lastname: Jiang
authors.forename: Di-Hu
authors.initials: DH
authors.lastname: Xu
authors.forename: Xiang
authors.initials: X
authors.lastname: Xiong
authors.forename: Xian-Rong
authors.initials: XR
authors.lastname: Huang
authors.forename: Mu
authors.initials: M
authors.lastname: Wang
keywords: broadband transmission of metallic gratings; freely tunable polarization conversion; polarization rotator of terahertz waves