title: Antenna-coupled field-effect transistors for multi-spectral terahertz imaging up to 4.25 THz.
abstract: We demonstrate for the first time the applicability of antenna-coupled field-effect transistors for the detection of terahertz radiation (TeraFETs) for multi-spectral imaging from 0.76 to 4.25 THz. TeraFETs were fabricated in a commercial 90-nm CMOS process and noise-equivalent powers of 59, 20, 63, 85 and 110 pW/√(Hz) at 0.216, 0.59, 2,52, 3.11 and 4.25 THz, respectively, have been achieved. A set of TeraFETs has been applied in raster-scan transmission and reflection imaging of pellets of sucrose and tartaric acid simulating common plastic explosives. Transmittance values are in good agreement with Fourier-transform infrared spectroscopy data. The spatial distribution of the components in the samples has been determined from the transmission data using principal component analysis.
authors.forename: M
authors.initials: M
authors.lastname: Bauer
authors.forename: R
authors.initials: R
authors.lastname: Venckevičius
authors.forename: I
authors.initials: I
authors.lastname: Kašalynas
authors.forename: S
authors.initials: S
authors.lastname: Boppel
authors.forename: M
authors.initials: M
authors.lastname: Mundt
authors.forename: L
authors.initials: L
authors.lastname: Minkevičius
authors.forename: A
authors.initials: A
authors.lastname: Lisauskas
authors.forename: G
authors.initials: G
authors.lastname: Valušis
authors.forename: V
authors.initials: V
authors.lastname: Krozer
authors.forename: H G
authors.initials: HG
authors.lastname: Roskos