摘要
A novel scheme for high-efficiency terahertz(THz)wave generation based on optimized cascaded difference frequency generation(OCDFG)with planar waveguide is presented.The phase mismatches of each-order cascaded difference frequency generation(CDFG)are modulated by changing the thickness of the waveguide,resulting in a decrement of phase mismatches in cascaded Stokes processes and an increment of phase mismatches in cascaded anti-Stokes processes simultaneously.The modulated phase mismatches enhance the cascaded Stokes processes and suppress the cascaded anti-Stokes processes simultaneously,yielding energy conversion efficiencies over 25%from optical wave to THz wave at 100 K.
作者
Zhongyang Li
Jia Zhao
Wenkai Liu
Qingfeng Hu
Yongjun Li
Binzhe Jiao
Pibin Bing
Hongtao Zhang
Lian Tan
Jianquan Yao
李忠洋;赵佳;刘文锴;胡青峰;李永军;焦彬哲;邴丕彬;张红涛;谭联;姚建铨(College of Electric Power,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;College of Surveying and Geo-informatics,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;College of Precision Instrument and Opto-electronics Engineering,Institute of Laser and Opto-electronics,Tianjin University,Tianjin 300072,China)
基金
Project supported by the National Natural Science Foundation of China(Grant Nos.61735010,31671580,and 61601183)
Natural Science Foundation of Henan Province,China(Grant No.162300410190)
Program for Science&Technology Innovation Talents in Universities of Henan Province,China(Grant No.18HASTIT023)。
