Title :
High resolution terahertz laser spectrometer
Author :
Constantin, L.F. ; Margulès, L. ; Willaert, F. ; Demaison, J.
Author_Institution :
Lab. de Phys. des Lasers, Lille I Univ., Villeneuve d´´Ascq, France
fDate :
27 Sept.-1 Oct. 2004
Abstract :
The terahertz range of the electromagnetic spectrum (100 GHz - 10 THz) represents a gap between electronic and photonic devices. The advent of some THz-wave sources (difference-frequency generation by near-infrared lasers photomixed on semiconductor substrates, ultra-short pulse generation with photoconductive antennas pumped by femtosecond lasers or terahertz parametric oscillation) open new trends in broadband communications or imaging. Two approaches (metallic meshes and Bragg reflectors) are competitive in order to build low-cost high-finesse devices required in high resolution terahertz spectroscopy experiments.
Keywords :
carbon compounds; gas lasers; gold; infrared spectrometers; metallic thin films; optical frequency conversion; optical pumping; submillimetre wave imaging; submillimetre wave lasers; submillimetre wave spectra; 100 GHz to 10 THz; Au; Bragg reflectors; CO2; Si; THz wave sources; broadband communications; broadband imaging; difference frequency generation; electromagnetic spectrum; electronic devices; femtosecond lasers; high resolution terahertz spectroscopy; metallic meshes; near infrared lasers; photoconductive antennas; photonic devices; semiconductor substrates; terahertz imaging; terahertz laser spectrometer; terahertz parametric oscillation; ultrashort pulse generation; Broadband antennas; Electromagnetic spectrum; Laser excitation; Optical pulse generation; Photoconducting devices; Pulse generation; Pump lasers; Semiconductor lasers; Spectroscopy; Substrates;
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422069
