Modulations to molecular high order harmonic generation by electron de Broglie wave

Details Modulations to molecular high order harmonic generation by electron de Broglie wave Modulations to molecular high order harmonic generation by electron de Broglie wave

2008-01-29

arxiv.org/abs/0801.4436v1

Physics

Atomic Physics

5 pages, 3 figures

Scientific paper

We present a new theory that the molecular high order harmonic generation in an intense laser field is determined by molecular internal symmetry and momentum distribution of the tunneling-ionized electron. The molecular internal symmetry determines the quantum interference form of the returning electron inside the molecule. The electron momentum distribution determines the relative interference strength of each individual electron de Broglie wave. All individual electron de Broglie wave interferences add together to collectively modulate the molecular high harmonic generation. We specifically discuss the suppression of the generation on adjacent harmonic orders and the dependence of molecular high harmonic generation on laser intensities and molecular axis alignment. Our theoretical results are in good consistency with the experimental observations.

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