Fragmentation Control of a Polyatomic Molecule by fully determined Laser-Fields

Xinhua Xie ,Andrius Baltuška ,K Varga,Stefanie Gräfe ,Sergiy Bubin ,Stefan Roither ,Tim Rathje ,Kaoru Yamanouchi ,Li Zhang ,Daniil Kartashov ,Hao Xu ,Mackenzie Atkinson ,G G Paulus,Katharina Doblhoff-Dier ,M S Schöffler ,Markus Kitzler

doi:10.1051/epjconf/20134102021

Abstract

Strong-field control of acetylene fragmentation by fully determined few- cycle laser pulses is demonstrated. The control mechanism is shown to be based on elec- tron recollision and inelastic ionization from inner-valence molecular orbitals.

Highlights

Using such pulses it has been shown that and CO+ [5], as well as the directionality the localization of an electron during dissociation of D+2 [3, 4] of multiple dissociative channels of CO [6] can be controlled
Chemistry is usually perceived as breaking and making molecular bonds. These processes that typically occur on the timescale of tens of femtoseconds to nanoseconds are preceded and governed by the much faster intra-molecular motion of electrons that proceeds on the sub-femtosecond timescale [1, 2]. This timescale matches the light oscillations of laser pulses carried at frequencies in the visible and near-infrared
We study the fragmentation of acetylene, C2H2, subject to fully determined few-cycle laser electric fields

Summary

Introduction

Using such pulses it has been shown that and CO+ [5], as well as the directionality the localization of an electron during dissociation of D+2 [3, 4] of multiple dissociative channels of CO [6] can be controlled. As the electric field of strong laser pulses is capable of exerting forces onto the electrons that are comparable to those of the binding forces, it becomes possible to drive the intra-molecular electron density by light. Deterministic steering, requires fully controlled laser electric fields, for example few-cycle pulses with a locked carrier-envelope (CE) offset frequency.

Results

Conclusion