Dynamic tunnelling ionization of H-+(2) in intense fields

L.Y. Peng, Daniel Dundas, James McCann, Kenneth Taylor, Ian Williams

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


Intense-field ionization of the hydrogen molecular ion by linearly polarized light is modelled by direct solution of the fixed-nuclei time-dependent Schrodinger equation and compared with recent experiments. Parallel transitions are calculated using algorithms which exploit massively parallel computers. We identify and calculate dynamic tunnelling ionization resonances that depend on laser wavelength and intensity, and molecular bond length. Results for lambda similar to 1064 nm are consistent with static tunnelling ionization. At shorter wavelengths lambda similar to 790 nm large dynamic corrections are observed. The results agree very well with recent experimental measurements of the ion spectra. Our results reproduce the single peak resonance and provide accurate ionization rate estimates at high intensities. At lower intensities our results confirm a double peak in the ionization rate as the bond length varies.
Original languageEnglish
Pages (from-to)L295-L302
Number of pages8
JournalJournal of Physics B: Atomic Molecular and Optical Physics
Issue number18
Publication statusPublished - 28 Sep 2003


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