Molecular recollision interferometry in high harmonic generation

Molecular recollision interferometry in high harmonic generation

We use extreme-ultraviolet interferometry to measure the phase of high-order harmonic generation from transiently aligned CO(2) molecules. We unambiguously observe a reversal in phase of the high-order harmonic emission for higher harmonic orders with a sufficient degree of alignment. This results f...

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Veröffentlicht in:Physical review letters 2008-02, Vol.100 (7), p.073902-073902, Article 073902
Hauptverfasser: Zhou, Xibin, Lock, Robynne, Li, Wen, Wagner, Nick, Murnane, Margaret M, Kapteyn, Henry C
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container_issue 7
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container_title Physical review letters
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creator Zhou, Xibin
Lock, Robynne
Li, Wen
Wagner, Nick
Murnane, Margaret M
Kapteyn, Henry C
description We use extreme-ultraviolet interferometry to measure the phase of high-order harmonic generation from transiently aligned CO(2) molecules. We unambiguously observe a reversal in phase of the high-order harmonic emission for higher harmonic orders with a sufficient degree of alignment. This results from molecular-scale quantum interferences between the molecular electronic wave function and the recolliding electron as it recombines with the molecule, and is consistent with a two-center model. Furthermore, using the combined harmonic intensity and phase information, we extract accurate information on the dispersion relation of the returning electron wave packet as a function of harmonic order. This analysis shows evidence of the effect of the molecular potential on the recolliding electron wave.
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title Molecular recollision interferometry in high harmonic generation
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