叠加态下3色场波形优化增大谐波辐射截止能量及强度  

Waveform optimization of 3-color field to increase the harmonic cutoff energy and intensity in the presence of superposition state

作　　者：王语凝 詹淞婷 刘扬 冯立强[1,2] 刘航[2] WANG Yu-Ning;ZHAN Song-Ting;LIU Yang;FENG Li-Qiang;LIU Hang(College of Science,Liaoning University of Technology,Jinzhou 121001,China;School of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学理学院,锦州121001 [2]辽宁工业大学化学与环境工程学院,锦州121001

出　　处：《原子与分子物理学报》2022年第4期109-112,共4页Journal of Atomic and Molecular Physics

基　　金：辽宁省自然科学基金面上项目(2019-MS-167);辽宁省教育厅青年项目;大学生创新项目(202110154004,X2021057)。

摘　　要：在He^(+)离子1s态和2s态的叠加态作为初始态时,提出一种优化3束激光场来增大谐波截止能量和强度的方法.结果表明:在叠加初始态下,谐波强度要比基态初始态下增强3个数量级以上.随后,在3色场波形优化下,谐波截止能量又得到增大,进而获得一个高强度、高光子能量的谐波光谱连续区.通过叠加光谱连续区上最后100次的谐波可以获得一个27 as的孤立阿秒脉冲.When the superposition state of 1 s and 2 s states of He^(+)ion is the initial state, a method of optimizing 3-color laser field to increase the harmonic cutoff energy and intensity is proposed. The results show that in the superposition initial state, the harmonic intensity is more than 3 orders of magnitude stronger than that in the ground initial state case. Further, the harmonic cutoff energy can be increased by optimizing 3-color laser waveform, showing a harmonic spectrum continuous region with the high-intensity and high photon energy. By superposing the last 100 harmonics in the spectral continuum, an isolated attosecond pulse of 27 as can be obtained.

关 键 词：高次谐波 叠加态模型 3色场波形优化 孤立阿秒脉冲 

分 类 号：O562.4[理学—原子与分子物理]