2003/08/29 by Liang-You Peng, Daniel Dundas, J F McCann +2 · 1 citation
Physics and Astronomy · #Advanced Chemical Physics Studies #Laser-Matter Interactions and Applications #Spectroscopy and Quantum Chemical Studies #physics.atom-ph #physics.chem-ph #physics.comp-ph #quant-ph
paper · pdf · doi:10.1088/0953-4075/36/18/101
published as J. Phys. B: At. Mol. Opt. Phys. 36 (2003) L295-L302 · 8 pages, 3 figures
openalex publication_date 2003/08/29 · arxiv created 2004/02/20 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
Intense-field ionization of the hydrogen molecular ion by linearly polarized light is modelled by direct solution of the fixed-nuclei time-dependent Schrödinger 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 λ ∼ 1064 nm are consistent with static tunnelling ionization. At shorter wavelengths λ ∼ 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.