Energy Scaling of Terahertz Pulses Produced through Difference Frequency Generation  

作　　者：白亚 宋立伟 刘鹏 李儒新 

机构地区：[1]State Key Laboratory of High Field Laser Physics,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800 [2]Collaborative Innovation Center of IFSA,Shanghai Jiao Tong University,Shanghai 200240

出　　处：《Chinese Physics Letters》2017年第1期44-47,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant Nos 11274326,61221064,61405222,11134010 and 11127901;the Shanghai Sailing Program under Grant No 14YF1406200

摘　　要：We study the energy scaling of terahertz (THz) emission through difference frequency generation of near-infrared pulses, and demonstrate that Gigawatt few-cycle THz transients at the central frequency of 30 THz are produced from GaSe crystal pumped by two pulses at 1.65 and 1.95 micrometers, with the high quantum yield of 28%. Our analysis indicates that the high yield of DFG originates from the largely reduced group velocity mismatch as the long-wavelength pumping pulses are employed.We study the energy scaling of terahertz (THz) emission through difference frequency generation of near-infrared pulses, and demonstrate that Gigawatt few-cycle THz transients at the central frequency of 30 THz are produced from GaSe crystal pumped by two pulses at 1.65 and 1.95 micrometers, with the high quantum yield of 28%. Our analysis indicates that the high yield of DFG originates from the largely reduced group velocity mismatch as the long-wavelength pumping pulses are employed.

关 键 词：DFG Energy Scaling of Terahertz Pulses Produced through Difference Frequency Generation length THz 

分 类 号：O441[理学—电磁学]