Abstract
A microscopic theory is presented for multiple harmonic generation (MHG) from a metal surface in the jellium approximation and for laser intensities below the critical value for plasma formation. Calculations are presented for the second and up to the sixth harmonic, in the case of a gold surface and for laser wavelengths 800 and 1064 nm, with femtosecond and picosecond laser pulses. The peaks of the harmonic pulses are delayed relative to the peak of the incident laser pulse by about 20 to 30 fs due to the finite electron-relaxation times. The calculated relative peak intensities of the various harmonics are most sensitive to the values of the relaxation times, and MHG provides a way of determining these times.
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An erratum to this article can be found at http://dx.doi.org/10.1007/s00340-005-1930-2.
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Georges, A.T., Karatzas, N.E. Theory of multiple harmonic generation in reflection from a metal surface. Appl. Phys. B 81, 479–485 (2005). https://doi.org/10.1007/s00340-005-1880-8
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DOI: https://doi.org/10.1007/s00340-005-1880-8