This article is cited in 2 papers

Nonlinear optical phenomena

Influence of the density of a medium on high-order harmonic generation by atoms in strong laser fields

V. D. Taranukhin

Lomonosov Moscow State University, Faculty of Physics

Abstract: An investigation is reported of the maximum possible increase in the density of a medium needed to increase the efficiency of high-order harmonic generation by atoms ionised with high-intensity radiation. This investigation is based on a classical description of the motion of a quasi-free photoelectron in a continuum and of its perturbation by the surrounding ions. A strong dependence of the optimal concentration of atoms on the pump radiation wave- length is revealed. The spectral characteristics of high-order harmonic generation resulting from an increase in the density of the medium are predicted.

PACS: 42.65.Ky, 42.60.Lh

Received: 27.04.1998

 English version: Quantum Electronics, 1998, 28:9, 783–787

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