Abstract
Using a triatomic molecular model, we show that the interference pattern in the high-order above-threshold ionization (HATI) spectrum depends dramatically on the charge distribution of the molecular ion. Therefore the charge distribution can be considered a crucial factor for imaging a molecular geometric structure. Based on this study, a general destructive interference formula for each above-threshold ionization channel is obtained for a polyatomic molecule concerning the positions and charge values of each nuclei. Comparisons are made for the HATI spectra of ${\mathrm{CO}}_{2}$, ${\mathrm{O}}_{2}$, ${\mathrm{NO}}_{2}$, and ${\mathrm{N}}_{2}$. These results may shed light on imaging complex molecular structure by the HATI spectrum.
Published Version
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