Figure 1.

Direct laser writing of transparent fused silica glass. a) Schematic of the developed process for DLW of 3D fused silica microparts using silica nanocomposites. Glassomer nanocomposites consist of silica nanoparticles inside a photocurable binder matrix. The resin R6‐3 is polymerized and shaped using two‐photon DLW. The resulting polymerized nanocomposite is turned into transparent fused silica glass using thermal debinding and sintering. b) UV–vis spectrograph of silica nanocomposite without initiating system, showing a transmission of ≈91.7% at the illumination wavelength of 780 nm. c) Photograph of the R6‐3 nanocomposite resin. d) Logpile structure as green part and sintered fused silica glass part (scale bars: 500 µm).