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
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
Zhongyang Li;Jia Zhao;Wenkai Liu;Qingfeng Hu;Yongjun Li;Binzhe Jiao;Pibin Bing;Hongtao Zhang;Lian Tan;Jianquan Yao(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)。
