Optical properties of the Ti surface structured by femtosecond laser beam

Abstract

Wavelength-scaled periodic ripples formed on the Ti surface under the action of femtosecond laser irradiation have been investigated. The ripples were oriented in parallel to the incident light polarization. After initial formation of ripples, the following laser induced chemical transformation of metallic Ti into dielectric compound was established using the Raman scattering data. Weak Wood’s anomaly in the spectra on light diffracted by the structured Ti surface testifies the minor plasmonic activity.