Shift-multiplexed holographic digital data page storage in a nanoparticle-(thiol–ene) polymer composite film

Abstract

We demonstrate shift-multiplexed holographic storage of 180 digital data pages with low symbol-error rates in a thick (250 μm) SiO2 nanoparticle-polymer composite film using step-growth thiol-ene photopolymerization. A two-dimensional 2:4 modulation code was employed for formatting digital data pages in order to reduce the average intensity of code block without decreasing the coding efficiency. This study clearly shows the feasibility of the thiol-ene based nanoparticle-polymer composite system as a holographic data storage medium.

Thiol‐Ene versus Binary Thiol–Acrylate Chemistry: Material Properties and Network Characteristics of Photopolymers

“…[14][15][16] By employing multi-functional thiols, thiol-ene chemistry can also be applied to efficiently crosslink diene-rubber materials in liquid and solid state. [22][23][24][25][26] Due to the flexibility of the thioether bonds, thiol-ene networks comprise a low glass transition temperature (Tg), which limits their applicability as infusion resins for aerospace and automotive industry. [18] Low field 1 H multiple-quantum (MQ) solid-state NMR experiments revealed that thiol-ene elastomer networks exhibit homogenous networks with narrow spatial crosslink distributions and a low amount of short chain defects (<5%).…”

“…[19][20][21] While thiol-ene chemistry is of great value in the fabrication of functional elastomers, the convenient formation of uniform polymer networks with low shrinkage stress is a sought-after property in numerous applications, ranging from dental restoratives over advanced coatings to optical materials. [22][23][24][25][26] Due to the flexibility of the thioether bonds, thiol-ene networks comprise a low glass transition temperature (Tg), which limits their applicability as infusion resins for aerospace and automotive industry. [27] Different approaches have been pursued to increase the Tg of thiol-ene materials involving the use of cyclic alkenes (e.g., norbornenes) and the formation of interpenetrating polymer networks by combining thiol-ene photopolymerizations with thermal curing systems (e.g., curing of thiols with epoxy monomers or curing of epoxy monomers with amines).…”

Efficient initiation of radical‐mediated thiol‐ene chemistry with photoactive silica particles

“…The convenient formation of uniform polymer networks is of particular interest in photolithographic and soft imprint technologies as they lead to high resolution of the inscribed patterns . In addition, low shrinkage stress is sought after in numerous applications including dental restoratives, coatings and optical materials …”

Characterization of volume holographic recording in photopolymerizable nanoparticle-(thiol-ene) polymer composites at 404 nm

“…31 Using such thiol-ene based NPCs at the stoichiometric thiol-to-ene ratio, we showed shrinkage reduction below 0.5% with Dn sat as large as 1 Â 10 À2 and S higher than a) Electronic mail: ytomita@uec.ac.jp 0021-8979/2015/117(5)/053105/6/$30.00 V C 2015 AIP Publishing LLC 117, 053105-1 Furthermore, we used such thiol-ene based NPCs as greensensitized HDS media to demonstrate the excellent performance in holographic shift multiplexing of more than 200 of 2D digital data pages with high fidelity. 32,33 The thiol-ene photopolymerization mechanism was also used to record electrically switchable reflection gratings in holographic polymer-dispersed liquid crystals at Ar-ion and solid-state laser lines of 364, 442, 488, and 532 nm. 31,[34][35][36] Thanks to the recent development of highly coherent blue diode lasers for HDS, 37 it is possible to implement compact HDS systems in the blue (at and near the 405-nm diode laser line).…”