Abstract
One-dimensional quasiperiodic structures whose period is much smaller than the wavelength of exciting radiation 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 quasiperiodic ablation nanogrooves to regular lattices with subwave periods (100–400 nm). In contrast to the preceding 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 incident 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.
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Original Russian Text © E.V. Golosov, V.I. Emel’yanov, A.A. Ionin, Yu.R. Kolobov, S.I. Kudryashov, A.E. Ligachev, Yu.N. Novoselov, L.V. Seleznev, D.V. Sinitsyn, 2009, published in Pis’ma v Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2009, Vol. 90, No. 2, pp. 116–120.
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Golosov, E.V., Emel’yanov, V.I., Ionin, A.A. et al. Femtosecond laser writing of subwave one-dimensional quasiperiodic nanostructures on a titanium surface. Jetp Lett. 90, 107–110 (2009). https://doi.org/10.1134/S0021364009140057
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DOI: https://doi.org/10.1134/S0021364009140057