Hong-Dan Zhang, Jing Guo, Hui-Ying Zhong, Xiangpeng Luo, Hui-Ni Du, Yan Shi, Xuri Huang, Xue-Shen Liu
{"title":"利用紫外辅助啁啾场产生三维哈托姆的高次谐波和隔离阿秒脉冲","authors":"Hong-Dan Zhang, Jing Guo, Hui-Ying Zhong, Xiangpeng Luo, Hui-Ni Du, Yan Shi, Xuri Huang, Xue-Shen Liu","doi":"10.4208/JAMS.022016.041316A","DOIUrl":null,"url":null,"abstract":"By solving the time-dependent Schrodinger equation (TDSE) accuratelywith time-dependent generalized pseudospectral (TDGPS) method, we theoretically investigated the high-order-harmonic generation (HHG) from three dimensional (3D) Hydrogen atom in ultraviolet (UV)-assisted chirped fields. When a 128 nm UV pulse is added on a chirped fundamental field, the HHG spectra is greatly broadened and enhanced, which is quite similar as the HHG from H atom initially prepared in the first excited state in the chirped field only. Besides, the HHG of H atom in the combination of a chirped fundamental field and a 256 nm UV pulse case is also investigated. The HHG process is illustrated by the semi-classical three-step model and the timefrequency analysis. The ionization probability and electron wavepacket as functions of time are also calculated to further illustrate this phenomenon. Furthermore, we also discuss the influence of time delay between the chirped fundamental field and the 128 nm UV pulse on HHG process. Finally, by superposing the harmonics in the range of 200th-260th order, an isolated attosecond pulse with a duration of about 64 as can be generated. PACS: 32.80.Rm, 42.65.Re, 42.65.Ky","PeriodicalId":15131,"journal":{"name":"Journal of Atomic and Molecular Sciences","volume":"9 1","pages":"135-145"},"PeriodicalIF":0.0000,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"High-order harmonics and isolated-attosecond pulse generation of Three-Dimensional Hatom by UV-assisted chirped fields\",\"authors\":\"Hong-Dan Zhang, Jing Guo, Hui-Ying Zhong, Xiangpeng Luo, Hui-Ni Du, Yan Shi, Xuri Huang, Xue-Shen Liu\",\"doi\":\"10.4208/JAMS.022016.041316A\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"By solving the time-dependent Schrodinger equation (TDSE) accuratelywith time-dependent generalized pseudospectral (TDGPS) method, we theoretically investigated the high-order-harmonic generation (HHG) from three dimensional (3D) Hydrogen atom in ultraviolet (UV)-assisted chirped fields. When a 128 nm UV pulse is added on a chirped fundamental field, the HHG spectra is greatly broadened and enhanced, which is quite similar as the HHG from H atom initially prepared in the first excited state in the chirped field only. Besides, the HHG of H atom in the combination of a chirped fundamental field and a 256 nm UV pulse case is also investigated. The HHG process is illustrated by the semi-classical three-step model and the timefrequency analysis. The ionization probability and electron wavepacket as functions of time are also calculated to further illustrate this phenomenon. Furthermore, we also discuss the influence of time delay between the chirped fundamental field and the 128 nm UV pulse on HHG process. Finally, by superposing the harmonics in the range of 200th-260th order, an isolated attosecond pulse with a duration of about 64 as can be generated. PACS: 32.80.Rm, 42.65.Re, 42.65.Ky\",\"PeriodicalId\":15131,\"journal\":{\"name\":\"Journal of Atomic and Molecular Sciences\",\"volume\":\"9 1\",\"pages\":\"135-145\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2016-08-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Atomic and Molecular Sciences\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.4208/JAMS.022016.041316A\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Atomic and Molecular Sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4208/JAMS.022016.041316A","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
High-order harmonics and isolated-attosecond pulse generation of Three-Dimensional Hatom by UV-assisted chirped fields
By solving the time-dependent Schrodinger equation (TDSE) accuratelywith time-dependent generalized pseudospectral (TDGPS) method, we theoretically investigated the high-order-harmonic generation (HHG) from three dimensional (3D) Hydrogen atom in ultraviolet (UV)-assisted chirped fields. When a 128 nm UV pulse is added on a chirped fundamental field, the HHG spectra is greatly broadened and enhanced, which is quite similar as the HHG from H atom initially prepared in the first excited state in the chirped field only. Besides, the HHG of H atom in the combination of a chirped fundamental field and a 256 nm UV pulse case is also investigated. The HHG process is illustrated by the semi-classical three-step model and the timefrequency analysis. The ionization probability and electron wavepacket as functions of time are also calculated to further illustrate this phenomenon. Furthermore, we also discuss the influence of time delay between the chirped fundamental field and the 128 nm UV pulse on HHG process. Finally, by superposing the harmonics in the range of 200th-260th order, an isolated attosecond pulse with a duration of about 64 as can be generated. PACS: 32.80.Rm, 42.65.Re, 42.65.Ky