Abstract
We study the state-resolved production of neon ion after resonant photoionization of Ne via the - Fano resonance. We find that by tuning the photon energy across the Fano resonance, a surprisingly high control over the alignment of the final hole along the polarization direction can be achieved. In this way, hole alignments can be created that are otherwise very hard to achieve. The mechanism responsible for this hole alignment is the destructive interference of the direct and indirect (via the autoionizing state) ionization pathways of . By changing the photon energy, the strength of the interference varies and hole alignments with ratios up to 19:1 between and holes can be created—an effect normally only encountered in tunnel ionization using strong-field ir pulses. The inclusion of spin-orbit interaction does not change the qualitative feature and leads only to a reduction in the alignment by . Our study is based on a time-dependent configuration-interaction singles approach, which solves the multichannel time-dependent Schrödinger equation.
- Received 10 March 2014
DOI:https://doi.org/10.1103/PhysRevA.89.043415
©2014 American Physical Society