Published in
American Physical Society, Physical Review Letters, 14(100)
DOI: 10.1103/physrevlett.100.143902
2007 European Conference on Lasers and Electro-Optics and the International Quantum Electronics Conference
DOI: 10.1109/cleoe-iqec.2007.4386336
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- American Physical Society
- Institute of Electrical and Electronics Engineers
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Quantum Path Interferences in High-Order Harmonic Generation
,
A. Guandalini,
F. Schapper,
J. Biegert ,
L. Gallmann,
U. Keller,
A. S. Wyatt,
T. Auguste,
E. Cormier,
A. Monmayrant,
P. Salières,
I. A. Walmsley,
J. P. Caumes
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Abstract
We have investigated the intensity dependence of high-order harmonic generation in argon when the two shortest quantum paths contribute to the harmonic emission. For the first time to our knowledge, experimental conditions were found to clearly observe interference between these two quantum paths that are in excellent agreement with theoretical predictions. This result is a first step towards the direct experimental characterization of the full single-atom dipole moment and demonstrates an unprecedented accuracy of quantum path control on an attosecond time scale.