Angularly resolved high-order harmonic generation in helium

J. W. G. Tisch; R. A. Smith; J. E. Muffett; M. Ciarrocca; J. P. Marangos; M. H. R. Hutchinson

doi:10.1103/PhysRevA.49.R28

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Angularly resolved high-order harmonic generation in helium

J. W. G. Tisch, R. A. Smith, J. E. Muffett, M. Ciarrocca, J. P. Marangos, and M. H. R. Hutchinson

Phys. Rev. A 49, R28(R) – Published 1 January 1994

Abstract

We report the observation of harmonics up to the 119th in helium, generated using a 1.053-μm, 1-ps chirped-pulse-amplification laser at intensities up to 3× $10^{14}$ W/ ${cm}^{2}$ , and the measurement of their far-field spatial distribution. Complex spatial distributions are found for harmonics in the plateau region and near the cutoff; their angular distribution narrows to approximately that predicted by lowest-order perturbation theory.

Received 19 July 1993

DOI:https://doi.org/10.1103/PhysRevA.49.R28

Authors & Affiliations

J. W. G. Tisch, R. A. Smith, J. E. Muffett, M. Ciarrocca, J. P. Marangos, and M. H. R. Hutchinson

The Blackett Laboratory, Imperial College, London SW7 2BZ, United Kingdom

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Vol. 49, Iss. 1 — January 1994

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