title: A terahertz in-line polarization converter based on through-via connected double layer slot structures.
abstract: A terahertz (THz) in-line polarization converter that yields a polarization conversion ratio as high as 99.9% is demonstrated at 1 THz. It has double-layer slot structures oriented in orthogonal directions that are electrically connected by 1/8-wavelngth-long through-via holes beside the slot structures. The slots on the front metal-plane respond to the incident THz wave with polarization orthogonal to the slots and generates a circulating surface current around the slots. The surface current propagates along a pair of through-via holes that function as a two-wire transmission line. The propagating current generates a surface current around the backside slot structures oriented orthogonal to the slot structures on the front metal layer. The circulating current generates a terahertz wave polarized orthogonal to the backside slot structures and the 90° polarization conversion is completed. The re-radiating THz wave with 90° converted polarization propagates in the same direction as the incident THz wave.
authors.affiliation: School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Cheomdan-gwagiro 123, Gwangju 61005, South Korea.|Electrical Environment Research Center, Korea Electrotechnology Research Institute (KERI), 12, Bulmosan-ro 10Beon-gil, Changwon 51543, South Korea.
authors.forename: Jeong Min
authors.initials: JM
authors.lastname: Woo
authors.affiliation: School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Cheomdan-gwagiro 123, Gwangju 61005, South Korea.
authors.forename: Sajid
authors.initials: S
authors.lastname: Hussain
authors.affiliation: School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Cheomdan-gwagiro 123, Gwangju 61005, South Korea.|Research Institute of Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Cheomdan-gwagiro 123, Gwangju 61005, South Korea.
authors.forename: Jae-Hyung
authors.initials: JH
authors.lastname: Jang