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Large area uniform femtosecond-laser-induced periodic surface structures fabricated on heated LiNbO3:Fe

The influence of laser fluences and scanning speeds on the morphologies of laser-induced periodic surface structures (LIPSS) on heated LiNbO3:Fe (1000 °C) was investigated under femtosecond (fs) laser scanning irradiation. Laser fluence of 8.5 kJ m−2 and scanning speed of 1 mm s−1 were found to be optimum process parameters, and large-area fs-LIPSS on LiNbO3:Fe with an area of 8 mm × 8 mm were fabricated with these parameters. The wettability of laser-textured LiNbO3:Fe changed to be hydrophilic, and the absorptance was improved substantially in the spectral range of 400–2000 nm. This technique is efficient, and environmentally friendly, which will attract tremendous interest in nano-photoelectron and nano-mechanics.