Theoretical analysis of terahertz generation in periodically inverted nonlinear crystals based on cascaded difference frequency generation process

被引：6
作者：
Hu, Chen-Fei
Zhong, Kai [1 ]
Mei, Jia-Lin
Wang, Mao-Rong
Guo, Shi-Bei
Xu, Wen-Zhong
Liu, Peng-Xiang
Xu, De-Gang
Wang, Yu-Ye
Yao, Jian-Quan
机构：
[1] Tianjin Univ, Coll Precis Instrument & Optoelect Engn, Inst Laser & Optoelect, Tianjin 300072, Peoples R China
来源：
MODERN PHYSICS LETTERS B | 2015年 / 29卷 / 02期
基金：
高等学校博士学科点专项科研基金; 中国国家自然科学基金;
关键词：
Terahertz; difference frequency generation; quasi-phase-matching; cascaded; WAVE GENERATION; EFFICIENT; GAAS; CONVERSION;
D O I：
10.1142/S0217984914502637
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The characteristics of terahertz (THz) generation based on cascaded difference frequency generation (DFG) process in periodically inverted gallium arsenide (GaAs) and gallium phosphide (GaP) is calculated from coupled wave equations, in which the output enhancement factors are 5.4 and 3.9 in the two crystals, respectively, compared with DFG without cascading. The optimal interaction length, influence of crystal absorption, wave vector mismatch and pump intensity are analyzed. A short discussion on wavelength tuning is also given. The calculated optimal operating parameters and conclusions can provide good directions for the experimental design.
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页数：10
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