Theoretical analysis of laterally emitting terahertz-wave generation by difference-frequency generation in channel waveguides
Theoretical analysis of laterally emitting terahertz-wave generation by difference-frequency generation in channel waveguides
复制标题
通道波导中差频产生横向发射太赫兹波的理论分析
DOI：
10.1109/jqe.2002.806198
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发表时间：
2003
影响因子：
2.5
通讯作者：
H. Ito
中科院分区：
文献类型：
--
作者：
T. Suhara;Y. Avetisyan;H. Ito
对采用畴反转光栅的LiNbO/sub 3/沟道波导中差频产生顶部和侧面发射太赫兹波进行了理论分析。分析是基于绿色的功能和平面波展开的方法。得到了转换效率和方向性的数学表达式和数值数据。结果与二维模型一致，但更准确，适用于各种现实的设备配置。结果表明，虽然辐射是高度发散的，但使用窄通道波导可以实现更高的效率。
Theoretical analysis of top- and side-emitting terahertz-wave generation by difference frequency generation in LiNbO/sub 3/ channel waveguides with domain-inverted grating is presented. The analysis is based on Green's function and plane-wave expansion approaches. Mathematical expressions and numerical data for the conversion efficiency and the directionality were obtained. The results are consistent with those using two-dimensional model, but are more accurate and apply for various realistic device configurations. It was shown that higher efficiencies can be accomplished with narrow channel guides, although the radiation is highly divergent.