Title :
Imaging with a multichannel terahertz time-domain spectroscopy system at 1030 nm excitation wavelength
Author :
Brahm, A. ; Wilms, A. ; Dietz, R.J.B. ; Gobel, T. ; Schell, M. ; Notni, G. ; Tunnermann, Andreas
Author_Institution :
Fraunhofer Inst. for Appl. Opt. & Precision Eng. (IOF), Jena, Germany
Abstract :
We present Terahertz imaging with a 1D multichannel time-domain spectroscopy system (TDS) 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). The simultaneous measurement of 15 THz pulses with a pixel pitch of 1 mm increases the measurement speed by factor 15.
Keywords :
III-V semiconductors; aluminium compounds; gallium arsenide; indium compounds; photoconducting devices; semiconductor heterojunctions; terahertz spectroscopy; terahertz wave imaging; 1D multichannel time-domain spectroscopy system; InGaAs-InAlAs; detector; emitter; femtosecond fiber laser; frequency 15 THz; multichannel terahertz time-domain spectroscopy; multilayer heterostructures; photoconductive antennas; photoconductive array; pixel pitch; terahertz imaging; wavelength 1030 nm; Antenna measurements; Arrays; Detectors; Image resolution; Imaging; Lenses; Measurement by laser beam;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956040
