Attosecond Streaking Spectrum In The Photoionization Of The Hydrogen Molecular Ion

We investigate the attosecond streaking spectrum of H-2(+) by numerically solving the time-dependent Schrodinger equation. The results show that the streaking spectrum of H-2(+) depends sensitively on the internuclear distance R. In addition to the regular streaking structure, some streaking spectra of H-2(+) with the splitting and distorted structures are also observed as R changes. The splitting and distorted streaking spectra of H-2(+) are demonstrated to be related to the destructive two-center interference and resonant transition triggered by the IR field, respectively. Meanwhile, the mixture structure of split and distortion on the streaking spectrum of H-2(+) is attributed to the coupling of the destructive two-center interference and resonant transition. The R-dependent streaking spectra might pave an accessible route toward monitoring the ultrafast nuclear dynamics of molecules.