Theoretical analysis of dynamic chemical imaging with lasers using high-order harmonic generation

摘要: We report theoretical investigations of the tomographic procedure suggested by Itatani et al. [Nature (London) 432, 867 (2004)] for reconstructing highest occupied molecular orbitals (HOMOs) using high-order harmonic generation (HHG). Due to limited range harmonics from plateau region, we found that even under most favorable assumptions, it is still very difficult obtain accurate HOMO wave functions procedure, but symmetry HOMOs and internuclear separation between atoms can be accurately extracted, especially when lasers longer wavelengths are used generate HHG. Since relies on approximating continuum in recombination process plane waves, method no applied upon improvement theory. For future chemical imaging with lasers, suggest one may want focus how extract positions molecules instead, developing an iterative such theoretically calculated macroscopic HHG spectra best fit experimental data.