太赫兹科学与电子信息学报2026，Vol.24Issue(4)：476-482,7.DOI:10.11805/TKYDA2025166
周期性极化磷酸氧钛钾波导产生高效太赫兹波
Efficient terahertz wave generation in PPKTP waveguides
摘要
Abstract
In order to solve the problem of low conversion efficiency of conventional terahertz sources,this paper proposes a cascade differential frequency theoretical model based on Periodically Polarized Potassium Titanium Phosphate(PPKTP)planar waveguide,and establishes a theoretical design method for realizing high-efficiency terahertz radiation by combining the Cherenkov radiation effect with the Quasi-Phase-Matching(QPM)interaction.Numerical simulation results show that the 15th-order Cherenkov-type QPM cascade differential frequency generation of terahertz significantly breaks through the conventional Manley-Rowe efficiency limit,and the terahertz photon conversion efficiency reaches 424.5%,which is 15 times higher than that of the cascade-free scheme.By theoretically analyzing the cascade difference frequency combined with the Cherenkov effect to generate terahertz waves,and optimizing the waveguide structure parameters and pump light frequency,the terahertz output power is further improved,providing a theoretical basis for the development of high-power integrated terahertz sources.关键词
波导/太赫兹波/准相位匹配/切伦科夫效应Key words
waveguide/terahertz wave/Quasi-Phase-Matching(QPM)/Cherenkov effect分类
数理科学引用本文复制引用
刘烈龙,饶志明..周期性极化磷酸氧钛钾波导产生高效太赫兹波[J].太赫兹科学与电子信息学报,2026,24(4):476-482,7.基金项目
国家自然科学基金资助项目(62065008) （62065008）
