Attosecond transient-absorption spectroscopy of polar molecules
Attosecond transient-absorption spectroscopy of polar molecules
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DOI：
10.1103/physreva.98.053401
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发表时间：
2018-09
影响因子：
2.9
通讯作者：
J. J. Rorstad-J.;Nikolaj S. W. Ravn;L. Yue;L. Madsen
中科院分区：
文献类型：
--
作者：
J. J. Rorstad-J.;Nikolaj S. W. Ravn;L. Yue;L. Madsen
We apply attosecond transient absorption spectroscopy (ATAS) to explore the effects of a nonzero permanent dipole on electron dynamics at the subfemtosecond scale, exemplified in the polar LiF molecule. In contrast with nonpolar systems, a familiar feature of the ATA spectra--the light-induced structures--are observed adjacent to a bright state. Moreover, a previously unobserved ladder structure is identified. The new observations are analyzed in the context of a model based on fixed-nuclei adiabatic states, supported by full numerical simulations. Analytic calculations originating in the adiabatic model shed light on the nature and origins of the new findings.
