Abstract
Uniform arrays of periodic nanoparticles with 80-nm period are formed on 6H-SiC crystal irradiated by circularly polarized 400-nm femtosecond laser pulses. In order to understand the formation mechanism, the morphology evolvement as a function of laser pulse energy and number is studied. Periodic nanoripples are also formed on the sample surface irradiated by linearly polarized 400-, 510- and 800-nm femtosecond laser pulses. All these results support well the mechanism that second-harmonic generation plays an important role in the formation of periodic nanostructures.
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79.20.Ds; 42.62.Cf; 61.80.Ba; 81.05.Cy; 78.30.Am
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Wu, X., Jia, T., Zhao, F. et al. Formation mechanisms of uniform arrays of periodic nanoparticles and nanoripples on 6H-SiC crystal surface induced by femtosecond laser ablation. Appl. Phys. A 86, 491–495 (2007). https://doi.org/10.1007/s00339-006-3797-4
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DOI: https://doi.org/10.1007/s00339-006-3797-4