Regular subwavelength surface structures induced by femtosecond laser pulses on stainless steel.
In this research, we studied the formation of laser-induced periodic surface structures on the stainless steel surface using femtosecond laser pulses. A 780 nm wavelength femtosecond laser, through a 0.2 mm pinhole aperture for truncating fluence distribution, was focused onto the stainless steel surface. Under different experimental condition, low-spatial-frequency laser-induced periodic surface structures with a period of 526 nm and high-spatial-frequency laser-induced periodic surface structures with a period of 310 nm were obtained. The mechanism of the formation of laser-induced periodic surface structures on the stainless steel surface is discussed.
Qi
Litao
L
Department of Mechanical Engineering, Chubu University, 1200 Matsumotocho, Kasugai, Aichi 487-8501, Japan.
Nishii
Kazuhiro
K
Namba
Yoshiharu
Y