Pure silica glass micro patterns anti-reflective coatings
Thanks to its transparency, thermal stability and mechanical robustness, glass is the material of choice for micro and nanostructured optical components when temperature changes, harsh environments and high laser powers are involved.
For LIDARS, optics components for laser beam shaping must handle large temperature range and harsh environments. Laser system integrators need optics and anti-reflective coatings that can handle high power to improve the performances of their tools. Display manufacturers need robust AR coatings to improve the readability. Solar panels Photovoltaic AR coatings compatible with outdoor can increase the yield of.
Conventional glass structuring relies on masking, usually by photolithograhy, and plasma etching. Our approach instead, combines sol-gel chemistry and molding resulting in pure fused-silica microstructures. Besides the lower cost, our process provides better performances, design versatility and compatibility with different types of glass (e.g. the refractive index can be adjusted with high precision to that of the substrate).
SOLNIL is also proposing different sol-gel materials to address non-glass substrates, such as sapphire and laser crystals.
Measured Laser Induced Damage Thresholds (LIDT):
- Laser 1064 nm, 10 ns pulse, 20 µm spot diameter: LIDT > 300 J/cm²
- Laser 1030 nm, 550 fs pulse, 50 µm spot diameter: LIDT ~ 5 J/cm²
