Open AccessMultichannel terahertz time-domain spectroscopy system at 1030 nm excitation wavelength
Author(s) -
A. Brahm,
A. Wilms,
R. J. B. Dietz,
Thorsten Göbel,
Martin Schell,
Gunther Notni,
Andreas Tünnermann
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.012982
Subject(s) - terahertz radiation , optics , femtosecond , materials science , terahertz spectroscopy and technology , terahertz time domain spectroscopy , optoelectronics , spectroscopy , laser , photomixing , detector , photodetector , wavelength , photoconductivity , far infrared laser , physics , terahertz metamaterials , quantum mechanics
We present Terahertz (THz) imaging with a 1D multichannel time-domain spectroscopy (TDS) system which operates with a photoconductive array of 15 detection channels excited by a 1030 nm femtosecond fiber laser. The emitter and detector are photoconductive antennas based on InGaAs/InAlAs multi-layer heterostructures (MLHS). We characterized the THz optics and the resolution of the system. The performance is demonstrated by the multichannel imaging of two samples. A simultaneous measurement of 15 THz pulses with a pixel pitch of 1 mm increases the measurement speed of the TDS system by factor 15.