Attosecond-recollision-controlled selective fragmentation of polyatomic   molecules
  Control over various fragmentation reactions of a series of polyatomic molecules (acetylene, ethylene, 1,3-butadiene) by the optical waveform of intense few-cycle laser pulses is demonstrated experimentally. We show both experimentally and theoretically that the responsible mechanism is inelastic ionization from inner-valence molecular orbitals by recolliding electron wavepackets, whose recollision energy in few-cycle ionizing laser pulses strongly depends on the optical waveform. Our work demonstrates an efficient and selective way of pre-determining fragmentation and isomerization reactions in polyatomic molecules on sub-femtosecond time-scales. 
Xinhua Xie, Katharina Doblhoff-Dier, Stefan Roither, Markus S.   Sch\"offler, Daniil Kartashov, Huailiang Xu, Tim Rathje, Ge...
physics.chem-ph physics.atm-clus