Two-pulse control over double ionization pathways in CO2

The Journal of Chemical Physics
Sonia ErattupuzhaMarkus Kitzler

Abstract

We visualize and control molecular dynamics taking place on intermediately populated states during different sequential double ionization pathways of CO2 using a sequence of two delayed laser pulses which exhibit different peak intensities. Measured yields of CO2 (2+) and of fragment pairs CO(+)/O(+) as a function of delay between the two pulses are weakly modulated by various vibronic dynamics taking place in CO2 (+). By Fourier analysis of the modulations we identify the dynamics and show that they can be assigned to merely two double ionization pathways. We demonstrate that by reversing the sequence of the two pulses it becomes possible to control the pathway which is taken across CO2 (+) towards the final state in CO2 (2+). A comparison between the yields of CO2 (2+) and CO(+)/O(+) reveals that the modulating vibronic dynamics oscillate out-of-phase with each other, thus opening up opportunities for strong-field fragmentation control on extended time scales.

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Citations

Oct 7, 2016·Faraday Discussions·Artem RudenkoVinod Kumarappan
Nov 10, 2017·The Journal of Chemical Physics·Ning LiPeixiang Lu
Dec 15, 2017·Physical Chemistry Chemical Physics : PCCP·Derrick Ampadu BoatengKatharine Moore Tibbetts
Apr 26, 2018·Physical Review Letters·Mathew BrittonP B Corkum
Nov 22, 2020·The Journal of Chemical Physics·Dror M BittnerDaniel Strasser

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