Molecular Recollision Interferometry in High Harmonic Generation
| Autor: | Zhou, Xibin, Lock, Robynne, Li, Wen, Wagner, Nick, Murnane, Margaret. M., Kapteyn, Henry C. |
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| Rok vydání: | 2007 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.100.073902 |
| Popis: | We use extreme-ultraviolet interferometry to measure the phase of high-order harmonic generation from transiently aligned CO2 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 wavepacket as a function of harmonic order. This analysis shows evidence of the effect of the molecular potential on the recolliding electron wave. Comment: 16 pages, 4 figures |
| Databáze: | arXiv |
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