Spatiotemporal separation of high harmonic radiation into two quantum path components
Mette B. GaardeDepartment of Physics, Lund Institute of Technology, P.O. Box 118, S-22100 Lund, SwedenF. SalinCPMOH/ELIA, Université Bordeaux 1, 351 Cours de la Libération, 33405 Talence Cedex, FranceE. ConstantCPMOH/ELIA, Université Bordeaux 1, 351 Cours de la Libération, 33405 Talence Cedex, FrancePh. BalcouLaboratoire d’Optique Appliquée, ENSTA, Ecole Polytechnique, Unité Mixte de Recherches 7639, Centre National de la Recherche Scientifique, 91761 Palaiseau Cedex, FranceKenneth J. SchäferDepartment of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001K. C. KulanderTAMP Group, Lawrence Livermore National Laboratory, Livermore, California 94551A. L’Huillier
1999en
ABI
Annotatsiya
We present a spatiotemporal analysis of high harmonic generation, showing evidence for the presence of several quantum path contributions to the atomic dipole moment. We show that the harmonic radiation can largely be described as a sum of two fields having a phase proportional to the intensity of the generating field. We compare our results to recent experimental results demonstrating this separation [M. Bellini et al., Phys. Rev. Lett. 81, 297 (1998)]. We show how the temporal and spatial coherence properties are influenced by this effect, and discuss how it could be used to obtain better control of the generated harmonic radiation.
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