Energy-Resolved Ultrashort Delays of Photoelectron Emission Clocked by Orthogonal Two-Color Laser Fields

被引：95

作者：

Gong, Xiaochun ^{[1
]}

Lin, Cheng ^{[2
]}

He, Feng ^{[3
,4
]}

Song, Qiying ^{[1
]}

Lin, Kang ^{[1
]}

Ji, Qinying ^{[1
]}

Zhang, Wenbin ^{[1
]}

Ma, Junyang ^{[1
]}

Lu, Peifen ^{[1
]}

Liu, Yunquan ^{[5
,6
]}

Zeng, Heping ^{[1
]}

Yang, Weifeng ^{[2
]}

Wu, Jian ^{[1
,7
]}

机构：

[1] East China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China

[2] Shantou Univ, Dept Phys, Coll Sci, Shantou 515063, Guangdong, Peoples R China

[3] Shanghai Jiao Tong Univ, Minist Educ, Key Lab Laser Plasmas, Shanghai 200240, Peoples R China

[4] Shanghai Jiao Tong Univ, Dept Phys & Astron, Collaborat Innovat Ctr IFSA CICIFSA, Shanghai 200240, Peoples R China

[5] Peking Univ, Dept Phys, Beijing 100871, Peoples R China

[6] Peking Univ, State Key Lab Mesoscop Phys, Beijing 100871, Peoples R China

[7] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2017年 / 118卷 / 14期

关键词：

ABOVE-THRESHOLD IONIZATION; ATTOSECOND; TIME; PHOTOEMISSION; SPECTROSCOPY; PULSES;

D O I：

10.1103/PhysRevLett.118.143203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A phase-controlled orthogonal two-color (OTC) femtosecond laser pulse is employed to probe the time delay of photoelectron emission in the strong-field ionization of atoms. The OTC field spatiotemporally steers the emission dynamics of the photoelectrons and meanwhile allows us to unambiguously distinguish the main and sideband peaks of the above-threshold ionization spectrum. The relative phase shift between the main and sideband peaks, retrieved from the phase-of-phase of the photoelectron spectrum as a function of the laser phase, gradually decreases with increasing electron energy, and becomes zero for the fast electron which is mainly produced by the rescattering process. Furthermore, a Freeman resonance delay of 140 +/- 40 attoseconds between photoelectrons emitted via the 4f and 5p Rydberg states of argon is observed.

引用

页数：5

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