Fig. 1. Schematic of femtosecond laser direct writing

Fig. 2. Schematic of femtosecond laser two-photon polymerization

Fig. 3. (a) Interaction of ultrashort laser pulse and material; (b) ablation threshold with Gaussian beam

Fig. 4. Scanning electron microscopy image and laser confocal microscopy image of concave-convex microlens

Fig. 5. Imaging effect of microlens array at different positions

Fig. 6. (a)(b) Natural compound eye; (c)(d) artificial compound eye

Fig. 7. Fresnel lens array with hexagonal

Fig. 8. Electron microscopy images of Dammam gratings. (a) Original image; (b) 2×2; (c) 3×3; (d) 4×4; (e) 5×5; (f)6×6

Fig. 9. (a)(c)(e) Two microdisks coupled and its spectrum; (b)(d)(f) three microdisks coupled and its spectrum

Fig. 10. Beam quality after and before shaping

Fig. 11. Images of polymer spheres and cells in microchannel