@inproceedings{c1324d618e9543aa9af55a5a0aae9058,
title = "High dynamic range two-stage photopolymer materials through enhanced solubility high refractive index writing monomers",
abstract = "Holographic photopolymers capable of high refractive index modulations (Δn) on the order of 10-2 are integral for the fabrication of functional holographic optical elements (HOEs) for use in a range of optical applications. A novel high refractive index liquid writing monomer suitable for two-stage photopolymer systems was designed and synthesized. This monomer exhibits facile synthetic procedure, low viscosity, high refractive index as well as excellent solubility in a low refractive index urethane matrix. The solubility limit, refractive index change and reaction kinetics/conversion were studied against a commercial reference high refractive index monomer, 2,4,6-tribromophenyl acrylate (TBPA). Superior performance in solubility to TBPA is shown with similar reaction kinetics and final conversion as confirmed by realtime Fourier transform infrared spectroscopy (FTIR) and real-time monitoring of diffraction grating growth. We demonstrate the ability to load substantial amounts of these writing monomers enabling a straightforward path to higher achievable Δn values (peak-to-mean Δn ∼ 0.03) without sacrificing optical properties (transparency, color or scatter) as validated through recording ∼100% efficiency volume transmission holograms in sub-15 μm thick films.",
keywords = "GRIN, HOEs, holography, n, photopolymer, refractive index modulation, writing monomer",
author = "Alim, {Marvin D.} and Sudheendran Mavila and Glugla, {David J.} and Chen Wang and Nystrom, {Philip D.} and Sullivan, {Amy C.} and Bowman, {Christopher N.} and McLeod, {Robert R.}",
note = "Publisher Copyright: Copyright {\textcopyright} 2018 SPIE. Downloading of the abstract is permitted for personal use only.; Practical Holography XXXII: Displays, Materials, and Applications 2018 ; Conference date: 29-01-2018 Through 31-01-2018",
year = "2018",
month = jan,
day = "1",
doi = "10.1117/12.2290029",
language = "English",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Bove, {V. Michael} and Bjelkhagen, {Hans I.} and Bjelkhagen, {Hans I.}",
booktitle = "Practical Holography XXXII",
address = "United States",
}