Abstract
We report on the morphological effects induced by the inhomogeneous absorption of radially polarized femtosecond laser irradiation of nickel (Ni) in sub-ablation conditions. A theoretical prediction of the morphology profile is performed, and the role of surface plasmon excitation in the production of self-formed periodic ripple structures is evaluated. Results indicate a smaller periodicity of the ripples profile compared to that attained under linearly polarized irradiation conditions. A combined hydrodynamical and thermoelastic model is presented in laser beam conditions that lead to material melting. The simulation results are presented to be in good agreement with the experimental findings. The ability to control the size of the morphological changes via modulating the beam polarization may provide an additional route for controlling and optimizing the outcome of laser micro-processing.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Zheqiang Zhong, Pengcheng Hou, and Bin Zhang
Opt. Lett. 40(24) 5850-5853 (2015)
Jukun Liu, Hua Zhao, Ke Cheng, Jiaqi Ju, Donghai Feng, Shian Zhang, Zhenrong Sun, and Tianqing Jia
Opt. Express 27(26) 37859-37876 (2019)
Sohail A. Jalil, Jianjun Yang, Mohamed Elkabbash, Yuhao Lei, Wanlin He, and Chunlei Guo
Opt. Lett. 44(9) 2278-2281 (2019)