title: Subwavelength InSb-based Slot wavguides for THz transport: concept and practical implementations.
abstract: Seeking better surface plasmon polariton (SPP) waveguides is of critical importance to construct the frequency-agile terahertz (THz) front-end circuits. We propose and investigate here a new class of semiconductor-based slot plasmonic waveguides for subwavelength THz transport. Optimizations of the key geometrical parameters demonstrate its better guiding properties for simultaneous realization of long propagation lengths (up to several millimeters) and ultra-tight mode confinement (~λ2/530) in the THz spectral range. The feasibility of the waveguide for compact THz components is also studied to lay the foundations for its practical implementations. Importantly, the waveguide is compatible with the current complementary metal-oxide-semiconductor (CMOS) fabrication technique. We believe the proposed waveguide configuration could offer a potential for developing a CMOS plasmonic platform and can be designed into various components for future integrated THz circuits (ITCs).
authors.affiliation: Department of Electrical and Computer Engineering, Dalhousie University, Halifax, NS B3J 2X4, Canada.
authors.forename: Youqiao
authors.initials: Y
authors.lastname: Ma
authors.affiliation: Institute of Photonics, Faculty of Science, Ningbo University, Ningbo 315211, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Nanotechnology Centre, VSB Technical University of Ostrava, Ostrava-Poruba 708 33, Czech Republic.
authors.forename: Jaromír
authors.initials: J
authors.lastname: Pištora
authors.affiliation: Department of Electrical and Computer Engineering, Dalhousie University, Halifax, NS B3J 2X4, Canada.
authors.forename: Mohamed
authors.initials: M
authors.lastname: Eldlio
authors.affiliation: Department of Electrical and Computer Engineering, Dalhousie University, Halifax, NS B3J 2X4, Canada.
authors.forename: Nghia
authors.initials: N
authors.lastname: Nguyen-Huu
authors.affiliation: Faculty of Information Engineering Department of Information and Communication Engineering, Fukuoka Institute of Technology, Fukuoka 811-0295, Japan.
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Maeda
authors.affiliation: Department of physics and electrical engineering, Northumbria University, Newcastle NE1 8ST, United Kingdom.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wu
authors.affiliation: Department of Electrical and Computer Engineering, Dalhousie University, Halifax, NS B3J 2X4, Canada.
authors.forename: Michael
authors.initials: M
authors.lastname: Cada