Open AccessA Flexible Phase-Insensitive System for Broadband CW-Terahertz Spectroscopy and Imaging
Author(s) -
M. Yahyapour,
N. Vieweg,
A. Roggenbuck,
F. Rettich,
O. Cojocari,
A. Deninger
Publication year - 2016
Publication title -
ieee transactions on terahertz science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.087
H-Index - 56
eISSN - 2156-3446
pISSN - 2156-342X
DOI - 10.1109/tthz.2016.2589540
Subject(s) - fields, waves and electromagnetics
We present a compact, robust, and flexible continuous-wave (CW) terahertz system, ideally suited for both imaging and high-resolution broadband spectroscopy. The setup employs an incoherent detection scheme: A photomixer transmitter is combined with a zero-bias Schottky diode on the receiver side. The useable bandwidth extends to 1500 GHz, with a spectral resolution on the 10 MHz level. In proof-of-principle measurements, we apply our setup to imaging of objects within a paper envelope as well as transmission and reflection-mode spectroscopy, taking advantage of the high spectral resolution of the terahertz source and the broad bandwidth and efficiency of the Schottky receiver.