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Updated: May 28, 2026

Harmonic Nanoparticles for Regenerative Research
Published on: May 1, 2014
High-order harmonic generation employing field enhancement by metallic fractal rough surfaces
Kwang-Hyon Kim1, Anton Husakou, Joachim Herrmann
1Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy, Max-Born-Str. 2a, Berlin D-12489, Germany.
Abstract:
We numerically investigate high-order harmonic generation (HHG) in noble gases in the vicinity of fractal structures of metallic rough surfaces described by the restricted solid-on-solid model. The calculated intensity enhancement factors in the range of 10³ enables HHG up to the 50-th order with low pump intensity down to tens of GW/cm². The increased interaction volume of "hot spots" in the case of grazing incidence of s-polarized pump pulses leads to an efficiency of harmonics in the plateau region of about 10⁻⁷.
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