Two attosecond pulse transient absorption spectroscopy and extraction of the instantaneous AC Stark shift in helium

被引：0
|
作者：
Baekhoj, Jens E. [1 ]
Madsen, Lars Bojer [1 ]
机构：
[1] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark
来源：
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2016年 / 49卷 / 14期
关键词：
attosecond transient absorption; attosecond pump/probe; instantaneous AC Stark shift; ultrafast dynamics; DYNAMICS;
D O I：
10.1088/0953-4075/49/14/14LT02
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In two attosecond pulse absorption spectroscopy (TAPAS) the use of two attosecond XUV pulses allows the extraction of atomic and molecular quantum mechanical dipole phases from spectroscopic measurements. TAPAS relies on interference between processes that individually only include a single XUV photon, and therefore does not rely on high intensity attosecond pulses. To show the usefulness and limitations of the TAPAS method we investigate its capability of capturing the instantaneous AC Stark shift induced by a midinfrared 3200 nm pulse in the vertical bar 1s2p > state of helium.
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页数：5
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