Femtosecond Laser Writing of Subwave OneDimensionalQuasiperiodic Nanostructures on a Titanium Surfaceстатья
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Дата последнего поиска статьи во внешних источниках: 29 ноября 2013 г.
Аннотация:Onedimensional quasiperiodic structures whose period is much smaller than the wavelength of exciting radi
ation have been obtained on a titanium surface under the multipulse action of linearly polarized femtosecond
laser radiation with various surface energy densities. As the radiation energy density increases, the one
dimensional surface nanorelief oriented perpendicularly to the radiation polarization evolves from quasipe
riodic ablation nanogrooves to regular lattices with subwave periods (100–400 nm). In contrast to the preced
ing works for various metals, the period of lattices for titanium decreases with increasing energy density. The
formation of the indicated surface nanostructures is explained by the interference of the electric fields of inci
dent laser radiation and a surface electromagnetic wave excited by this radiation, because the length of the
surface electromagnetic wave for titanium with significant interband absorption decreases with an increase in
the electron excitation of the material