Title :
Frequency-tunable terahertz wave generation via excitation of phonon-polaritons in GaP and beam properties
Author :
Tanabe, T. ; Suto, K. ; Nishizawa, J. ; Saito, K. ; Kimura, T.
Author_Institution :
Dept. of Mater. Sci., Tohoku Univ., Sendai, Japan
Abstract :
High-power, frequency-tunable terahertz (THz) waves over the range from 0.3 to 7.5 THz were generated based on difference-frequency generation in GaP crystals using a YAG laser and an optical parametric oscillator. The THz-wave linewidth was estimated to 3.2 GHz and spatial distribution is discussed. We measured the absorption coefficient of the GaP as well as spectra of polytetrafluroethylene (PTFE) in the THz frequency region.
Keywords :
III-V semiconductors; absorption coefficients; gallium compounds; optical frequency conversion; optical parametric oscillators; optical polymers; phonons; polaritons; spectral line breadth; submillimetre wave generation; submillimetre wave spectra; 0.3 to 7.5 THz; GaP; GaP crystals; THz-wave linewidth; YAG; YAG laser; YAl5O12; absorption coefficient; beam properties; difference-frequency generation; frequency-tunable terahertz waves; optical parametric oscillator.; phonon-polaritons excitation; polytetrafluroethylene; spatial distribution; terahertz wave generation; Biomedical optical imaging; Crystals; Frequency; Laser beams; Laser excitation; Optical mixing; Optical pumping; Oscillators; Power generation; Pump lasers;
Conference_Titel :
Compound Semiconductors: Post-Conference Proceedings, 2003 International Symposium on
Print_ISBN :
0-7803-8614-0
DOI :
10.1109/ISCSPC.2003.1354453
