Abstract

We report on a new technique of silicon surface nanostructuring in liquid with a pair of Gaussian-shaped femtosecond laser pulses. The bubble, generated in liquid near the molten silicon surface by the first pulse, serves as a dynamic microscale obstacle for spatial modulation of the intensity profile of the second pulse following at a certain delay via scattering processes. As a result, the circular ripple patterns with anomalously high surface-relief modulation, undersurface annular nanocavities, and interfacial smoothness are produced at the surface. The possibility of the control over the specific pattern through the laser intensity variation is shown.

© 2020 Optical Society of America

Silicon microprotrusions with tailored chirality enabled by direct femtosecond laser ablation

S. Syubaev, E. Mitsai, A. Porfirev, S. Khonina, S. Kudryashov, T. Katkus, S. Juodkazis, E. L. Gurevich, and A. Kuchmizhak
Opt. Lett. 45(11) 3050-3053 (2020)

Producing anomalous uniform periodic nanostructures on Cr thin films by femtosecond laser irradiation in vacuum

Fei Wang, Bo Zhao, Yuhao Lei, Jianjun Yang, and Chunlei Guo
Opt. Lett. 45(6) 1301-1304 (2020)

Laser-induced damage thresholds and mechanism of silica glass induced by ultra-short soft x-ray laser pulse irradiation

Katsuhiro Mikami, Masahiko Ishino, Thanh-Hung Dinh, Shinji Motokoshi, Noboru Hasegawa, Akira Kon, Yuichi Inubushi, Shigeki Owada, Hiroo Kinoshita, and Masaharu Nishikino
Opt. Lett. 45(8) 2435-2438 (2020)

Reshaping enhancement of gold nanorods by femtosecond double-pulse laser

Dezhi Zhu, Jianfeng Yan, and Jiawang Xie
Opt. Lett. 45(7) 1758-1761 (2020)

Controllable formation of laser-induced periodic surface structures on ZnO film by temporally shaped femtosecond laser scanning

Shaojun Wang, Lan Jiang, Weina Han, Wei Liu, Jie Hu, Suocheng Wang, and Yongfeng Lu
Opt. Lett. 45(8) 2411-2414 (2020)