Three-wave interactions of surface defect-deformation waves and their manifestations in the self-organisation of nano- and microstructures in solids exposed to laser radiationстатья
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Дата последнего поиска статьи во внешних источниках: 29 ноября 2013 г.
Аннотация:The self-organisation of the surface-relief nano-
structures in solids under the action of energy and particle
êuxes is interpreted as the instability of defect-deformation
(DD) gratings produced by quasi-static Lamb and Rayleigh
waves and defect-concentration waves. The allowance for the
nonlocality in the defects ë lattice atom interaction with a
simultaneous account for both (normal and longitudinal)
defect-induced forces bending the surface layer leads to the
appearance of two maxima in the dependence of the
instability growth rate of DD waves on the wave number.
Three-wave interactions of quasi-static coupled DD waves
(second harmonic generation and wave vector mixing) are
considered for the érst time, which are similar to three-wave
interactions in nonlinear optics and acoustics and lead to the
enrichment of the spectrum of surface-relief harmonics.
Computer processing of experimental data on laser-induced
generation of micro- and nanostructures of the surface relief
reveals the presence of effects responsible for the second
harmonic generation and wave vector mixing