Single- and multi-pulse formation of surface structures under static femtosecond irradiation

Abstract : Femtosecond surface structure modifications are investigated under irradiation with laser pulses of 150 fs at 800 nm, on copper and silicon.We report sub-wavelength periodic structures formation (ripples) with a periodicity of 500 nm for both materials. These ripples are perpendicular to the laser polarization and can be obtained with only one pulse. The formation of these ripples corresponds to a fluence threshold of 1 J/cm2 for copper and 0.15 J/cm2 for silicon.We find several morphologies when more pulses are applied: larger ripples parallel to the polarization are formed with a periodicity of 1 mm and degenerate into a worm-like morphology with a higher number of pulses. In addition, walls of deep holes also show subwavelength and large ripples
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https://hal-ujm.archives-ouvertes.fr/ujm-00170151
Contributor : Florence Garrelie <>
Submitted on : Thursday, September 6, 2007 - 3:06:28 PM
Last modification on : Wednesday, July 25, 2018 - 2:05:31 PM

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  • HAL Id : ujm-00170151, version 1

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Matthieu Guillermin, Florence Garrelie, Nicolas Sanner, Eric Audouard, Hervé Soder. Single- and multi-pulse formation of surface structures under static femtosecond irradiation. Applied Surface Science, Elsevier, 2007, 253, pp.8075-9079. ⟨ujm-00170151⟩

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