2 Ultrafast Laser Enabling Versatile Fabrication of Surface …
95
Fig. 2.20 Photographs of ultrafast laser colorized steel surfaces. The scanning speeds for samples
a–f were 1000, 1500, 2000, 2500, 3000, and 3500 mm s −1 , respectively. The area of all sample
surfaces is 20 × 20 mm 2 . Reproduced from [59] with permission from Laser Institute of America
Fig. 2.21 a, b Optical image of water droplets on a colorful metal surface treated by ultrafast laser;
c, d photographs of a water droplet rolling down when the sample was tilted. Reproduced from [53]
with permission from Elsevier
2.5 Antireflection of Metal Surface Micro-nano Dual-scale
Structures
2.5.1 Tunable Antireflection via Metal Surface Particle
Structures
The reflection spectra of particle structures of different dimensions in the UV–VISNIR spectrum range were plotted in Fig. 2.22a. The single-scale nanoparticles show
characteristic peaks and valleys in its reflection spectrum in the visible range, as
95
Fig. 2.20 Photographs of ultrafast laser colorized steel surfaces. The scanning speeds for samples
a–f were 1000, 1500, 2000, 2500, 3000, and 3500 mm s −1 , respectively. The area of all sample
surfaces is 20 × 20 mm 2 . Reproduced from [59] with permission from Laser Institute of America
Fig. 2.21 a, b Optical image of water droplets on a colorful metal surface treated by ultrafast laser;
c, d photographs of a water droplet rolling down when the sample was tilted. Reproduced from [53]
with permission from Elsevier
2.5 Antireflection of Metal Surface Micro-nano Dual-scale
Structures
2.5.1 Tunable Antireflection via Metal Surface Particle
Structures
The reflection spectra of particle structures of different dimensions in the UV–VISNIR spectrum range were plotted in Fig. 2.22a. The single-scale nanoparticles show
characteristic peaks and valleys in its reflection spectrum in the visible range, as