Antenna-coupled field-effect transistors for multi-spectral terahertz imaging up to 4.25 THz

作者：Bauer M^*; Venckevicius R; Kasalynas I; Boppel S; Mundt M; Minkevicius L; Lisauskas A; Valusis G; Krozer V; Roskos H G

来源：Optics Express, 2014, 22(16): 19235-19241.

DOI：10.1364/OE.22.019235

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/root 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.

• 出版日期2014-8-11