外文题目: Ultrafast Excitation of an Inner-Shell Electron by Laser-Induced Electron Recollision
作者: Deng, Yunpei; Zeng, Zhinan; Jia, Zhengmao; Komm, Pavel; Zheng, Yinhui; Ge, Xiaochun; Li, Ruxin; Marcus, Gilad
刊名: Phys. Rev. Lett.
年: 2016 卷: 116 期: 7 文章编号：73901
英文关键词:

ORDER HARMONIC-GENERATION; IONIZATION; SPECTROSCOPY; IONS
英文摘要:
Extreme ultraviolet attosecond pulses, generated by a process known as laser-induced electron recollision, are a key ingredient for attosecond metrology, providing a tool to precisely initiate and probe subfemtosecond dynamics in atoms, molecules, and solids. However, extending attosecond metrology to scrutinize the dynamics of the inner-shell electrons is a challenge, that is because of the lower efficiency in generating the required soft x-ray ((h) over bar omega > 300 eV) attosecond bursts. Away around this problem is to use the recolliding electron to directly initiate the desired inner-shell process, instead of using the currently low flux x-ray attosecond sources. Such an excitation process occurs in a subfemtosecond time scale, and may provide the necessary "pump" step in a pump-probe experiment. Here we used a few cycle infrared (lambda(0) approximate to 1800 nm) source and observed direct evidence for inner-shell excitations through the laser-induced electron recollision process. It is the first step toward time-resolved core-hole studies in the keV energy range with subfemtosecond time resolution.


文献类型: 期刊论文
正文语种: English
收录类别: SCIEI
DOI: 10.1103/PhysRevLett.116.073901


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