Femtosecond laser color marking of metal and semiconductor surfaces |
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Authors: | Andrey A Ionin Sergey I Kudryashov Sergey V Makarov Leonid V Seleznev Dmitry V Sinitsyn Evgeniy V Golosov Ol’ga A Golosova Yuriy R Kolobov and Alexander E Ligachev |
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Institution: | (1) P.N. Lebedev Physical Institute, Russian Academy of Sciences, 119991 Moscow, Russia;(2) Belgorod State University, 308015 Belgorod, Russia;(3) A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, 119991 Moscow, Russia; |
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Abstract: | Color marking of rough or smooth metal (Al, Cu, Ti) and semiconductor (Si) surfaces was realized via femtosecond laser fabrication
of periodic surface nanorelief, representing one-dimensional diffraction gratings. Bright colors of the surface nanorelief,
especially for longer electromagnetic wavelengths, were provided during marking through pre-determined variation of the laser
incidence angle and the resulting change of the diffraction grating period. This coloration technique was demonstrated for
the case of silicon and various metals to mark surfaces in any individual color with a controllable brightness level and almost
without their accompanying chemical surface modification. |
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