Resonance-like enhancement in high-order above-threshold ionization of formic acid
Resonance-like enhancement in high-order above-threshold ionization of formic acid
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DOI：
10.1103/physreva.90.023405
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发表时间：
2014-08
影响因子：
2.9
通讯作者：
C. Wang;Y. Tian;S. Luo;W. Roeterdink;Yujun Yang;D. Ding;M. Okunishi;G. Prümper;K. Shimada
中科院分区：
文献类型：
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作者：
C. Wang;Y. Tian;S. Luo;W. Roeterdink;Yujun Yang;D. Ding;M. Okunishi;G. Prümper;K. Shimada
We have investigated the high-order above-threshold ionization (HATI) spectrum of formic acid by means of high-resolution electron spectroscopy using 800-nm femtosecond laser light. The resonance-like enhancement structures in the HATI spectrum are shown to be experimentally reproducible and three enhancement-suppression patterns are observed in different energy regimes with increasing laser intensity. We simulated these patterns successfully by computing the exact solution of time-dependent Schrödinger equation based on the simple hydrogen-like atom, subject to a time-dependent high-intensity laser pulse. The agreement between experiment and theory shows that “channel closing” effects play an important role in the observed resonance-like enhancements (RLEs). The existence of the RLEs for formic acid, which lacks any symmetry, shows that molecular symmetry does not affect the RLEs.
