All-Glass Metasurfaces for Ultra-Broadband and Large Acceptance Angle Antireflectivity: from Ultraviolet to Mid-Infrared

For many optics technologies, such as display screens, solar cells, laser systems, and eyeglasses, antireflective (AR) coatings are well integrated; these applications frequently benefit from the ability to function as broadband AR. Here, all-glass metasurfaces are reported on, exhibiting a measured reflectance of 0.18% +/- 0.23% per interface, averaged across wavelengths spanning from 350 nm (ultraviolet) to 2350 nm (mid-infrared); to the best of knowledge, this is the first-ever demonstration of an AR layer capable of this. Furthermore, acceptance angles up to 100 degrees (angle of incidence = +/- 50 degrees) results in %R < 0.6% per interface over the band 350-1300 nm for P-polarization and S-polarization, with wavelength averaged reflectance values 0.04% +/- 0.05% and 0.11% +/- 0.15%, respectively - another technological first. The process advancements presented here allow for reflectance suppression over a broad range of wavelengths, angles, and polarizations.

Automated summary

A study reports the development of all-glass metasurfaces with antireflective properties, achieving a measured reflectance of 0.18% - 0.23% per interface across a wide range of wavelengths. This is the first-ever demonstration of an AR layer capable of such performance. The metasurfaces also show low reflectance values for different polarizations and acceptance angles, making them technologically significant.