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APS » Journals » Phys. Rev. A » Volume 57 » Issue 6
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Phys. Rev. A 57, 4553–4560 (1998)

Macroscopic studies of short-pulse high-order harmonic generation using the time-dependent Schrödinger equation

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M. B. Gaarde1,2, Ph. Antoine3, A. L’Huillier1, K. J. Schafer4, and K. C. Kulander5
1Department of Physics, Lund Institute of Technology, P.O. Box 118, S-22100 Lund, Sweden
2Niels Bohr Institute, Ørsted Laboratory, Universitetsparken 5, 2100 Kbh Ø, Denmark
3Laboratoire de Physique Atomique et Moléculaire, Université Catholique de Louvain, 2 Chemin du Cyclotron, B-1348 Louvain-la-Neuve, Belgium
4Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803-4001
5TAMP Group, Lawrence Livermore National Laboratory, Livermore, California 94551

Received 3 December 1997; published in the issue dated June 1998

We consider high harmonic generation by ultrashort (27–108 fs) laser pulses and calculate the macroscopic response of a collection of atoms to such a short pulse. We show how the harmonic spectrum after propagation through the medium is significantly different from the single-atom spectrum. We use single-atom data calculated by integration of the time-dependent Schrödinger equation and propose a method, based on an adiabatic approximation, to extract the data necessary to perform a propagation calculation.

© 1998 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.57.4553
DOI:
10.1103/PhysRevA.57.4553
PACS:
32.80.Rm, 42.65.Ky
 
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