Element Six, a synthetic diamond supermaterials company, and part of the De Beers Group, recently announced the launch of Diamond PureOptics™, which it described as “The first all-diamond optic delivering order of magnitude higher performance for high power laser systems”.
This diamond optics range, the Company says, draws “inspiration from the anti-reflective structure of a moth’s eye”, and that it “offers improved reliability and even higher power density levels for high power CO2 laser systems”. 
Further it eliminates the need for thin film coatings, “enabling more than 10 times increase in Damage Thresholds for Applications Including EUV Lithography”, Element Six highlighted.
Explaining the thinking behind the product, Element Six said: As demands increase for faster through-put and new applications emerge such as extreme ultraviolet (EUV) lithography, which use CO2 lasers to generate sub 10 nm radiation, advanced solutions are required to produce more robust optics. To meet the associated application requirements, Element Six has pushed diamond synthesis and processing capabilities to new heights.”
“With the industry trending to even more powerful CO2 laser sources and the high costs associated with system downtime, the need for more durable and reliable anti-reflective laser windows is critical,” said Bruce Bolliger, head of sales and marketing at Element Six Technologies. “Creating an all-diamond solution increases durability and enables higher power by eliminating more vulnerable antireflection thin films, which are often the first to fail in extremely high power density applications such as EUV lithography. We are confident the enhanced performance of our Diamond PureOptics™ optical windows will enable the next generation of high power laser systems and advanced applications.”