Title :
Cascading in THz Wave Generation by Optical Rectification
Author :
Hattori, Toshiaki ; Takeuchi, Kousuke ; Ishii, Toshiki
Author_Institution :
Univ. of Tsukuba, Tsukuba
Abstract :
Cascading effects were analyzed for the THz wave generation by optical rectification in an electro-optic crystal using intense femtosecond optical pulses. Coupled equations describing the propagation of the optical and THz fields were solved numerically. Cascaded difference frequency generation within the pump pulse spectrum was observed to leads to red shift of the pump light spectrum and almost linear growth of THz amplitude as a function of propagation distance. Conversion efficiency of THz waves higher than the Manley-Rowe limit, which corresponds to 100% quantum yield, was obtained in the simulation using a ZnTe crystal.
Keywords :
electro-optical devices; light propagation; optical pulse generation; rectification; submillimetre wave generation; zinc compounds; Manley-Rowe limit; THz wave generation; ZnTe; cascaded difference frequency generation; cascading; electro-optic crystal; femtosecond optical pulses; optical propagation; optical rectification; pump pulse spectrum; Equations; Frequency; Lead compounds; Nonlinear optics; Optical coupling; Optical propagation; Optical pulse generation; Optical pulses; Optical pumping; Ultrafast optics;
Conference_Titel :
Infrared Millimeter Waves and 14th International Conference on Teraherz Electronics, 2006. IRMMW-THz 2006. Joint 31st International Conference on
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0400-2
Electronic_ISBN :
1-4244-0400-2
DOI :
10.1109/ICIMW.2006.368400
