调控空间非均匀啁啾场获得孤立阿秒脉冲  

Generation of isolated attosecond pulse by controllingspatial inhomogeneous chirped pulse

作　　者：刘辉[1] 周思淇 王语凝 刘航[2] 冯立强[1] 李姣婧 苗晨 LIU Hui;ZHOU Si-Qi;WANG Yu-Ning;LIU Hang;FENG Li-Qiang;LI Jiao-Jing;MIAO Chen(College of Science,Liaoning University of Technology,Jinzhou 121001,China;School of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou 121001,China;Bohai Shipyard Group Co.,Ltd,Huludao 125000,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 [3]渤海造船厂集团有限公司,葫芦岛125000

出　　处：《原子与分子物理学报》2022年第6期107-111,共5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：通过调节二阶啁啾参数和空间非均匀效应对高次谐波光谱进行了优化.结果表明:在长脉宽负向啁啾和负向非均匀效应组合下,谐波光谱截止能量和强度得到最佳增大,并获得X射线范围内的光谱连续区.最后,通过叠加光谱连续区上的部分谐波可获得一个脉宽仅为23 as的孤立脉冲.The high order harmonic spectrum is optimized by controlling the second order chirp parameter and the spatial inhomogeneous effect.The results show that under the combination of long pulse duration negative chirp and negative inhomogeneous effect,the cutoff energy and intensity of harmonic spectrum are optimally increased,and the spectral continuum in the X-ray range can be obtained.Finally,an isolated pulse with a duration of 23 as can be obtained by superposing some harmonics on the spectral continuum.

关 键 词：高次谐波 阿秒脉冲 二阶啁啾激光场 空间非均匀激光场 

分 类 号：O562.4[理学—原子与分子物理]