Quantum-path control in high-order harmonic generation at high photon energies

Details Quantum-path control in high-order harmonic generation at high photon energies Quantum-path control in high-order harmonic generation at high photon energies

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008njph...10b5021z&link_type=abstract

New Journal of Physics, Volume 10, Issue 2, pp. 025021 (2008).

Physics

4

Scientific paper

We show through experiment and calculations how all-optical quasi-phase-matching of high-order harmonic generation can be used to selectively enhance emission from distinct quantum trajectories at high photon energies. Electrons rescattered in a strong field can traverse short and long quantum trajectories that exhibit differing coherence lengths as a result of variations in intensity of the driving laser along the direction of propagation. By varying the separation of the pulses in a counterpropagating pulse train, we selectively enhance either the long or the short quantum trajectory, and observe distinct spectral signatures in each case. This demonstrates a new type of coupling between the coherence of high-order harmonic beams and the attosecond time-scale quantum dynamics inherent in the process.

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