Pulsewidth dependence of laser-induced periodic surface structure formed on yttria-stabilized zirconia polycrystal

Masayuki Kakehata; Hidehiko Yashiro; Ayako Oyane; Atsuo Ito; Kenji Torizuka

doi:10.1117/12.2209013

9 March 2016 Pulsewidth dependence of laser-induced periodic surface structure formed on yttria-stabilized zirconia polycrystal

Masayuki Kakehata, Hidehiko Yashiro, Ayako Oyane, Atsuo Ito, Kenji Torizuka

Author Affiliations +

Proceedings Volume 9740, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVI; 97401G (2016) https://doi.org/10.1117/12.2209013
Event: SPIE LASE, 2016, San Francisco, California, United States

Abstract

Three-mol% yttria-stabilized tetragonal zirconia polycrystal (3Y-TZP) is a fine engineering ceramic that offers high fracture resistance and flexural strength. Thus, it is often applied in mechanical components and medical implants. The surface roughness can be controlled to improve the device characters in some applications. Ultrashort pulse lasers can form laser-induced periodic surface structures (LIPSS) on 3Y-TZP, which have never been investigated in detail. Therefore, this paper reports the formation and characteristics of LIPSS formed on 3Y-TZP, focusing on the pulsewidth dependence. The LIPSS was formed by a Ti:sapphire chirped-pulse amplification system, which generates 810 nmcentered 80-fs pulses at a 570 Hz repetition rate. The measured ablation threshold peak fluence was ~1.5 J/cm² and the LIPSS was formed at the peak fluence of 2.7–7.7 J/cm². For linearly polarized pulses, the lines of the LIPSS were oriented parallel to the polarization direction, and their period was comparable to or larger than the center wavelength of the laser. These characteristics differ from the reported characteristics of LIPSS on metals and dielectrics. The pulsewidth dependence of the ablation and LIPSS was investigated for different pulsewidths and signs of chirp. Under the investigated fluence condition, the LIPSS period increased with increasing pulsewidth for both signs of chirp. Similar pulsewidth dependencies were observed for circularly polarized pulses.

Citation Download Citation

Masayuki Kakehata, Hidehiko Yashiro, Ayako Oyane, Atsuo Ito, and Kenji Torizuka "Pulsewidth dependence of laser-induced periodic surface structure formed on yttria-stabilized zirconia polycrystal", Proc. SPIE 9740, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XVI, 97401G (9 March 2016); https://doi.org/10.1117/12.2209013

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