Broadband antireflective structures with hole for highly transparent glasses

Optimal sub-wavelength structures (SWS) with parabolic hole on glass substrate are designed using effective medium theory (EMT), which will reduce the reflectance over wavelength range from 300 to 1200 nm and 0° to 80° angle of incidence. The performance of SWS integrated glass is verified by genetic algorithm. The optimized SWS with the cross-sectional profile of parabolic hole have parameters with ∼120 nm diameter and 300 nm height. The average reflectance over wavelength range from 300 to 1200 nm and 0° to 80° angle of incidence could be reduced to only 0.5% by applying the optimized SWS onto glass.