Direct Visualization of Valence Electron Motion Using Strong-Field Photoelectron Holography

被引:108
作者
He, Mingrui [1 ,2 ]
Li, Yang [1 ,2 ]
Zhou, Yueming [1 ,2 ]
Li, Min [1 ,2 ]
Cao, Wei [1 ,2 ]
Lu, Peixiang [1 ,2 ,3 ]
机构
[1] Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China
[2] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China
[3] Wuhan Inst Technol, Lab Opt Informat Technol, Wuhan 430205, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
HIGH-HARMONIC INTERFEROMETRY; MOLECULAR-DYNAMICS; CHARGE MIGRATION; WAVE-PACKET; TIME-SCALE; ATTOSECOND; PULSES; DIFFRACTION; GENERATION; PHASE;
D O I
10.1103/PhysRevLett.120.133204
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Watching the valence electron move in molecules on its intrinsic timescale has been one of the central goals of attosecond science and it requires measurements with subatomic spatial and attosecond temporal resolutions. The time-resolved photoelectron holography in strong-field tunneling ionization holds the promise to access this realm. However, it remains to be a challenging task hitherto. Here we reveal how the information of valence electron motion is encoded in the hologram of the photoelectron momentum distribution (PEMD) and develop a novel approach of retrieval. As a demonstration, applying it to the PEMDs obtained by solving the time-dependent Schrodinger equation for the prototypical molecule H-2(+), the attosecond charge migration is directly visualized with picometer spatial and attosecond temporal resolutions. Our method represents a general approach for monitoring attosecond charge migration in more complex polyatomic and biological molecules, which is one of the central tasks in the newly emerging attosecond chemistry.
引用
收藏
页数:6
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