title: Terahertz reflectarray as a polarizing beam splitter.
abstract: A reflectarray is designed and demonstrated experimentally for polarization-dependent beam splitting at 1 THz. This reflective component is composed of two sets of orthogonal strip dipoles arranged into interlaced triangular lattices over a ground plane. By varying the length and width of the dipoles a polarization-dependent localized phase change is achieved on reflection, allowing periodic subarrays with a desired progressive phase distribution. Both the simulated field distributions and the measurement results from a fabricated sample verify the validity of the proposed concept. The designed terahertz reflectarray can efficiently separate the two polarization components of a normally incident wave towards different predesigned directions of ±30°. Furthermore, the measured radiation patterns show excellent polarization purity, with a cross-polarization level below -27 dB. The designed reflectarray could be applied as a polarizing beam splitter for polarization-sensitive terahertz imaging or for emerging terahertz communications.
authors: Tiaoming
authors: T
authors: Niu
authors: Withawat
authors: W
authors: Withayachumnankul
authors: Aditi
authors: A
authors: Upadhyay
authors: Philipp
authors: P
authors: Gutruf
authors: Derek
authors: D
authors: Abbott
authors: Madhu
authors: M
authors: Bhaskaran
authors: Sharath
authors: S
authors: Sriram
authors: Christophe
authors: C
authors: Fumeaux