Harmonics Generation in Ultra-Thin Nanofilms
Irradiated by Intense Nonrelativistic Laser Pulses¹

Ph. Korneev

National Research Nuclear University MEPhI, Moscow, 115409 Russia

e-mail: korneev@theor.mephi.ru

Received July 21, 2011; in final form, July 25, 2011; published online October 24, 2011

Abstract—The problem of harmonics generation in nanotargets is considered at the range of parameters (a
nanotarget diameter and a pump laser intensity) when the oscillation amplitude of an electron in a target is much
larger than the target width. Electron motion in charged nanotargets in the presence of a laser field of different
(non-relativistic) strength is considered. It is demonstarted that for lasers of infrared frequencies clusters do not
possess strong enough potential to bound electrons with large oscillation amplitudes. Opposite to clusters,
nanofilms were found to be very perspective targets in the problem considered. A simple analytic model and
molecular dynamic simulations showed increased harmonics generation when the oscillation amplitude of elec-
trons in a film becomes much larger, than the film width. Different regimes of generation are briefly discussed.

10.1134/S1054660X11230095

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