Photopolymerizable glass with high refractive index species: overview of emerging implementations

We present an overview of the main properties and the emerging implementations corresponding to a photopolymerizable glass modified with high refractive index species (HRIS) incorporated at molecular level. The main characteristic of the HRIS photopolymerizable glass is the codirectional diffusion enhancement of monomer and HRIS species upon inhomogeneous illumination, yielding an increased dynamic range, along with low coherent and incoherent scattering noise, high optical quality and dimension stability[[1]–[3]]. The study concerns to transmission and reflection holograms in Bragg and Raman-Nath regimens for standard and over-modulated gratings [4] with spatial frequencies range from 50 to 6000 lines/mm. Polarization properties of gratings with high spatial frequencies are also analyzed demonstrating a strong dependence of the refractive index modulation with the polarization state of the reading beam [5].