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arXiv · 1401.6233

Attosecond streaking of Cohen-Fano interferences in the photoionization of H$_2^+$

Qi-Cheng Ning·Liang-You Peng·Shu-Na Song·Wei-Chao Jiang·Stefan Nagele·Renate Pazourek·Joachim Burgdörfer·Qihuang Gong
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Abstract

We present the first numerical simulation of the time delay in the photoionization of the simplest diatomic molecule H$_2^+$ as observed by attosecond streaking. We show that the strong variation of the Eisenbud-Wigner-Smith time delay as a function of energy and emission angle becomes observable in the streaking time shift provided laser field-induced components are accounted for. The strongly enhanced photoemission time shifts are traced to destructive Cohen-Fano (or two-center) interferences. Signatures of these interferences in the streaking trace are shown to be enhanced when the ionic fragments are detected in coincidence.

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Qi-Cheng Ning, Liang-You Peng, Shu-Na Song, Wei-Chao Jiang, Stefan Nagele, Renate Pazourek, Joachim Burgdörfer, Qihuang Gong. 2014-01-24. Attosecond streaking of Cohen-Fano interferences in the photoionization of H$_2^+$. https://doi.org/10.1103/physreva.90.013423

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