Theoretical study of tunable terahertz wave based on difference-frequency generation in AgGaSe2 crystal

被引：0
|
作者：
Xu S. [1 ]
Zhang H. [1 ]
Zhang Y. [1 ]
Wang C. [1 ]
机构：
[1] Qingdao Key Laboratory of Terahertz Technology, College of Science, Shandong University of Science and Technology
来源：
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2010年 / 22卷 / 11期
关键词：
AgGaSe[!sub]2[!/sub] crystal; Difference-frequency generation; Phase-matching; Terahertz wave; Tunable;
D O I：
10.3788/HPLPB20102211.2653
中图分类号：
学科分类号：
摘要：
Based on the technology of the collinear phase-matching about three-wave interactions in uniaxial crystal, the phase-match angle, walk-off angle, acceptance angle and effective nonlinear coefficient of the terahertz wave based on difference-frequency generation are calculated under oeo type and oee type phase-matching conditions in AgGaSe2 crystal pumped by CO2 laser. The results show that terahertz wave tunable range is very wide with two types of phase-matching conditions, and the walk-off angles are less than 1°, the acceptance angles are large enough. In the vast majority of terahertz wave region, effective nonlinear coefficient of oee type is much larger than that of oeo type, thus oee type is more suitable to be used in experiments.
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页码：2653 / 2657
页数：4
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