Inside Homerun’s UC Davis R&D: From Sand to Fused Silica

Homerun Resources has provided an in-depth look at its research and development collaboration with the University of California, Davis, focused on transforming silica sand from the Santa Maria Eterna project in Bahia, Brazil, into ultra-high-purity fused silica glass for photonics applications. The partnership leverages Professor Subhash Risbud's decades of expertise in femtosecond laser modification of fused silica and photonics to develop innovative processing methods that could revolutionize silica purification and glass production.

The collaboration has achieved two significant technical milestones. First, researchers developed a femtosecond thermal laser processing method that purified raw silica sand to 99.999% SiO₂ purity in as little as two hours, using intense laser pulses to remove impurities without chemical reagents. Second, the team successfully produced fused silica glass directly from raw SME silica sand using a one-step Fast Joule Heating process that reaches temperatures around 2,000°C through electrical resistance heating, completing the transformation from sand to glass in seconds.

These developments are particularly significant given the growing demand for ultra-high-purity fused silica in photonics applications, driven by AI infrastructure requirements and the industry's "Copper Wall" challenge. The company has filed patent applications to protect the femtosecond laser purification technology, establishing intellectual property around reagent-free processing methods that could offer substantial environmental and cost advantages over traditional chemical purification routes.

While the research remains at the proof-of-concept stage and requires scaling to commercial viability, the technical achievements demonstrate that Homerun's silica deposit responds exceptionally well to advanced purification technologies. The next phase involves scaling the Fast Joule Heating process to larger batch sizes, further characterizing the optical and mechanical properties of the produced glass, and exploring pathways to integrate these breakthrough technologies into commercial production systems. For the broader silica and photonics sectors, this work represents a potential paradigm shift toward more environmentally sustainable and cost-effective methods for producing critical materials for next-generation optical technologies.