title: Plasmon-Enhanced below Bandgap Photoconductive Terahertz Generation and Detection.
abstract: We use plasmon enhancement to achieve terahertz (THz) photoconductive switches that combine the benefits of low-temperature grown GaAs with mature 1.5 μm femtosecond lasers operating below the bandgap. These below bandgap plasmon-enhanced photoconductive receivers and sources significantly outperform commercial devices based on InGaAs, both in terms of bandwidth and power, even though they operate well below saturation. This paves the way for high-performance low-cost portable systems to enable emerging THz applications in spectroscopy, security, medical imaging, and communication.
authors.affiliation: Department of Electrical and Computer Engineering, University of Victoria , Victoria, British Columbia V8P 5C2, Canada.
authors.forename: Afshin
authors.initials: A
authors.lastname: Jooshesh
authors.affiliation: Department of Electrical and Computer Engineering, University of Victoria , Victoria, British Columbia V8P 5C2, Canada.
authors.forename: Vahid
authors.initials: V
authors.lastname: Bahrami-Yekta
authors.affiliation: Department of Electrical and Computer Engineering, University of Victoria , Victoria, British Columbia V8P 5C2, Canada.
authors.forename: Jinye
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Department of Electrical and Computer Engineering, University of Victoria , Victoria, British Columbia V8P 5C2, Canada.
authors.forename: Thomas
authors.initials: T
authors.lastname: Tiedje
authors.affiliation: Department of Electrical and Computer Engineering, University of Victoria , Victoria, British Columbia V8P 5C2, Canada.
authors.forename: Thomas E
authors.initials: TE
authors.lastname: Darcie
authors.affiliation: Department of Electrical and Computer Engineering, University of Victoria , Victoria, British Columbia V8P 5C2, Canada.
authors.forename: Reuven
authors.initials: R
authors.lastname: Gordon
keywords: femtosecond physics; midgap states; nanoplasmonics; photoconductive switches; terahertz