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Laser ablation and structuring of CdZnTe with femtosecond laser pulses
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Fig. 3.. SEM images of CdZnTe after irradiation with a sequence of various number of pulses N, at E = 5 μJ (Fp = 0.64 J/cm2) and corresponding zoomed views: (a, b) N = 30; (c-f) N = 50; (g-i) N = 100. The red arrow in panel (a) indicates the laser polarization direction. In the zoomed view of panel (b) cracks directed along three different directions are indicated and termed as type I, II, and III. Panel (d) shows the central region of the spot displayed in panel (c) evidencing periodic bumps separated by cracks, while periodic arrays of subwavelength holes formed close to the spot edges are shown in panels (e, f). The zoomed view of panel (h) addresses the columnar features formed at the center of the spot for N = 100. |
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