THz Dielectric Properties of 3D Printable Silica Nanoparticle-based Photoresin

GP-Silica, a newly developed photoresin embedded with silica nanoparticles useable with two-photon polymerization, aims to address the lack of low-loss material in the THz range. To determine its suitability for THz device fabrication, its dielectric properties were extracted over the range of 0.5 – 1.5 THz. Its refractive index was found to outperform other 3D printable materials by 1.2 – 1.4 times while its absorption coefficient was almost 5 times lower at 1 THz. The data shared cements the potential of not only GP-Silica but also two-photon polymerization for THz device manufacturing.