Umm-i-Kalsoom 1, 2, 3, †, , Bashir Shazia 2, Ali Nisar 1, 2, 4, Shahid Rafique M 5, Husinsky Wolfgang 1, Nathala Chandra S R 1, Makarov Sergey V 6, Begum Narjis 7
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(a) Magnified view of nano-LIPSS formation of Figs.1(a)and 1(b). Two-dimensional fast Fourier transform (FFT) spectra of Figs.1(a)and1(c). The variation in periodicity of nano-LIPSS for various local fluences using FFT after ablation of Ti under vacuum (10−3mbar) condition by 100 pulses of fsec laser at wavelength of 800 nm, pulse duration of 30 fsec, and repetition rate of 1 kHz. |