研究目的
Investigating the photoelectron momentum distributions of a diatomic molecule in a linearly polarized two-color laser field to understand the interference patterns and their relation to backscattering electron orbits.
研究成果
The study reveals that the upward curvature interference pattern in photoelectron momentum spectra corresponds to a holographic pattern from the second-return backscattering electron orbits. The distinct observation of this pattern in a two-color laser field is due to the asymmetric distribution of the electric field, which enhances the tunneling ionization rate of the second-return backscattering electron orbits. The findings suggest that photoelectron holography from backscattering electron orbits with different return times can provide time-resolved imaging of target structures.
研究不足
The study is theoretical, and the practical observation of the predicted interference patterns may be challenging due to the weak amplitudes of multireturn backscattering electron orbits compared to direct orbits.
