Volume 7, Issue 3
High-Order Harmonics and Isolated-Attosecond Pulse Generation of Three-Dimensional H Atom by UV-Assisted Chirped Fields

Hong-Dan Zhang, Jing Guo, Hui-Ying Zhong, Xiang-Yi Luo, Hui Du, Yan Shi, Xuri Huang & Xue-Shen Liu

J. At. Mol. Sci., 7 (2016), pp. 135-145.

Published online: 2016-07

Export citation
  • Abstract

By solving the time-dependent Schrödinger equation (TDSE) accurately with 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 time-frequency 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.

  • AMS Subject Headings

  • Copyright

COPYRIGHT: © Global Science Press

  • Email address

gjing@jlu.edu.cn (Jing Guo)

liuxs@jlu.edu.cn (Xue-Shen Liu)

  • BibTex
  • RIS
  • TXT
@Article{JAMS-7-135, author = {Zhang , Hong-DanGuo , JingZhong , Hui-YingLuo , Xiang-YiDu , HuiShi , YanHuang , Xuri and Liu , Xue-Shen}, title = {High-Order Harmonics and Isolated-Attosecond Pulse Generation of Three-Dimensional H Atom by UV-Assisted Chirped Fields}, journal = {Journal of Atomic and Molecular Sciences}, year = {2016}, volume = {7}, number = {3}, pages = {135--145}, abstract = {

By solving the time-dependent Schrödinger equation (TDSE) accurately with 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 time-frequency 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.

}, issn = {2079-7346}, doi = {https://doi.org/10.4208/jams.022016.041316a}, url = {http://global-sci.org/intro/article_detail/jams/8142.html} }
TY - JOUR T1 - High-Order Harmonics and Isolated-Attosecond Pulse Generation of Three-Dimensional H Atom by UV-Assisted Chirped Fields AU - Zhang , Hong-Dan AU - Guo , Jing AU - Zhong , Hui-Ying AU - Luo , Xiang-Yi AU - Du , Hui AU - Shi , Yan AU - Huang , Xuri AU - Liu , Xue-Shen JO - Journal of Atomic and Molecular Sciences VL - 3 SP - 135 EP - 145 PY - 2016 DA - 2016/07 SN - 7 DO - http://doi.org/10.4208/jams.022016.041316a UR - https://global-sci.org/intro/article_detail/jams/8142.html KW - High-order harmonic generation, generalized pseudospectral method, UV-assisted chirped fields, attosecond pulse. AB -

By solving the time-dependent Schrödinger equation (TDSE) accurately with 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 time-frequency 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.

Hong-Dan Zhang, Jing Guo, Hui-Ying Zhong, Xiang-Yi Luo, Hui Du, Yan Shi, Xuri Huang & Xue-Shen Liu. (2019). High-Order Harmonics and Isolated-Attosecond Pulse Generation of Three-Dimensional H Atom by UV-Assisted Chirped Fields. Journal of Atomic and Molecular Sciences. 7 (3). 135-145. doi:10.4208/jams.022016.041316a
Copy to clipboard
The citation has been copied to your clipboard