Formation of periodical surface ripple is widely observed in laser processing such as laser annealing, laser-induced chemical vapor deposition and laser etching. The ripple structures are closely related with the material properties and wavelengths used. Such structures were reported on the transparent material using a visible femtosecond laser pulse. In the paper, the ripple structure formed on Ni, Ag and GaP by the irradiation of ultra-short laser pulse of a Ti:sapphire laser is described. Pulse duration and repetition rate of the laser is 130 fs and 10 Hz, respectively. The laser beam was focused on the target using a lens of the focal length of 150 mm. The incident angle was varied from 0 degree to about 45 degree by rotating the sample mounted on an angle-tilting stage. The number of the laser pulse was varied from three to one hundred.
Periodical ripples on metal and semiconductor by femtosecond laser irradiation
01.01.1999
107264 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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