Abstract
SynopsisIn this work we explore the high-order harmonic generation in the H2+ molecule under the action of phase shaped pulses. To this end, quantum mechanical wavepacket calculations are performed within a collinear model of H2+. We analyze the effect of a chirp to the plateau extension of the HHG spectrum, observing significant differences with respect to the sign of the chirp parameter. This result is found to originate from a subtle electron recollision dynamics within the chirped laser pulses, as substantiated by classsical trajectory calculations. Extension of this work focuses on including the nuclear motion of H2+.
Highlights
The process of high harmonic generation has proven to be an effective source of extreme utraviolet and soft x-ray light with a crucial application to generate attosecond light pulses, which can be used in time-resolved pump-probe experiments
Since the up/down chirped pulses have the same spectrum, the observed asymmetry cannot be attributed to purely spectral arguments, using the three-step model, but is the result of a complex electron recombination dynamics
Quantum results are substantiated by classical trajectory calculations
Summary
The process of high harmonic generation has proven to be an effective source of extreme utraviolet and soft x-ray light with a crucial application to generate attosecond light pulses, which can be used in time-resolved pump-probe experiments. For the usual laser intensities, negative (down) chirp rates are found to be more efficient than positive (up) chirps.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
