Fig. 1. Schematic of parabolic cone array structure

Fig. 2. Relationship between microstructure period and structure parameters. (a) Reflectivity; (b) zero-order transmittance; (c) total transmittance

Fig. 3. Variations of reflectivity with wavelength at different d/Λ values of parabolic cone

Fig. 4. Variations of reflectivity with wavelength at different heights of parabolic cone

Fig. 5. Effect of biomimetic microstructure with different shapes on reflectivity (the shape of biomimetic microstructure changing from cylindrical rod to paraboloid)

Fig. 6. Schematic of fabrication procedure of microstructure

Fig. 7. (a) Lloyd’s mirror configuration; (b) AFM image of mask

Fig. 8. Scanning electron microscopy images of microstructure. (a) Top view (0°); (b) profile (90°)

Fig. 9. Curves of transmittance. (a) With and without microstructure; (b) simulated and experimental results