Open AccessHigh-order harmonic generation employing field enhancement by metallic fractal rough surfaces
Author(s) -
KwangHyon Kim,
Anton Husakou,
Joachim Herrmann
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.020910
Subject(s) - optics , fractal , high harmonic generation , harmonics , intensity (physics) , electric field , materials science , plateau (mathematics) , physics , laser , mathematical analysis , mathematics , quantum mechanics , voltage
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.