Attosecond transient absorption spectroscopy: Comparative study based on three-level modeling

doi:10.1088/1674-1056/27/1/013301

中国物理B ›› 2018, Vol. 27 ›› Issue (1): 13301-013301.doi: 10.1088/1674-1056/27/1/013301

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Attosecond transient absorption spectroscopy: Comparative study based on three-level modeling

Zeng-Qiang Yang(杨增强), Di-Fa Ye(叶地发), Li-Bin Fu(傅立斌)

1 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
2 CAPT, HEDPS, and IFSA Collaborative Innovation Center of MoE, Peking University, Beijing 100871, China;
3 Center for Fusion Energy Science and Technology, China Academy of Engineering Physics, Beijing 100088, China

收稿日期:2017-06-14 修回日期:2017-10-11 出版日期:2018-01-05 发布日期:2018-01-05
通讯作者: Zeng-Qiang Yang, Zeng-Qiang Yang E-mail:yangzq@ymail.com;lbfu@iapcm.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11674034 and 11564033) and the Foundation of President of the China Academy of Engineering Physics (Grant No. 2014-1-029).

Attosecond transient absorption spectroscopy: Comparative study based on three-level modeling

Zeng-Qiang Yang(杨增强)¹, Di-Fa Ye(叶地发)¹, Li-Bin Fu(傅立斌)^1,2,3

1 Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
2 CAPT, HEDPS, and IFSA Collaborative Innovation Center of MoE, Peking University, Beijing 100871, China;
3 Center for Fusion Energy Science and Technology, China Academy of Engineering Physics, Beijing 100088, China

Received:2017-06-14 Revised:2017-10-11 Online:2018-01-05 Published:2018-01-05
Contact: Zeng-Qiang Yang, Zeng-Qiang Yang E-mail:yangzq@ymail.com;lbfu@iapcm.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11674034 and 11564033) and the Foundation of President of the China Academy of Engineering Physics (Grant No. 2014-1-029).

摘要/Abstract

摘要： In the present paper, the time-resolved transient absorption spectroscopy of helium atoms is investigated based on the three-level modeling. The helium atoms are subjected to an extreme ultraviolet (XUV) attosecond pulse and a time-delayed infrared (IR) few-cycle laser field. The odd excited state are populated from the ground state by the XUV pulse due to the dipole selection rule, and probed by the time-delayed IR laser. The time-resolved transient absorption spectroscopy based on the different coupling mechanism demonstrate some different features, the photoabsorption spectrum based on three-level model with rotating wave approximation (RWA) cannot repeat the fast oscillation and the sideband structure which have been observed in the previous experimental investigation. The dressing effect of IR laser pulse on the ground state can contribute new interference structures in the photoabsorption spectrum.

关键词: extreme ultraviolet (XUV), photoabsorption, time delay, three-level model

Abstract: In the present paper, the time-resolved transient absorption spectroscopy of helium atoms is investigated based on the three-level modeling. The helium atoms are subjected to an extreme ultraviolet (XUV) attosecond pulse and a time-delayed infrared (IR) few-cycle laser field. The odd excited state are populated from the ground state by the XUV pulse due to the dipole selection rule, and probed by the time-delayed IR laser. The time-resolved transient absorption spectroscopy based on the different coupling mechanism demonstrate some different features, the photoabsorption spectrum based on three-level model with rotating wave approximation (RWA) cannot repeat the fast oscillation and the sideband structure which have been observed in the previous experimental investigation. The dressing effect of IR laser pulse on the ground state can contribute new interference structures in the photoabsorption spectrum.

Key words: extreme ultraviolet (XUV), photoabsorption, time delay, three-level model

中图分类号: (Spectra induced by strong-field or attosecond laser irradiation)

33.20.Xx

32.30.Jc (Visible and ultraviolet spectra) 32.80.Qk (Coherent control of atomic interactions with photons) 32.80.Wr (Other multiphoton processes)

杨增强, 叶地发, 傅立斌. Attosecond transient absorption spectroscopy: Comparative study based on three-level modeling[J]. 中国物理B, 2018, 27(1): 13301-013301.

Zeng-Qiang Yang(杨增强), Di-Fa Ye(叶地发), Li-Bin Fu(傅立斌). Attosecond transient absorption spectroscopy: Comparative study based on three-level modeling[J]. Chin. Phys. B, 2018, 27(1): 13301-013301.

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Attosecond transient absorption spectroscopy: Comparative study based on three-level modeling

Attosecond transient absorption spectroscopy: Comparative study based on three-level modeling

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