![]() These values meet the acceptable values for holographic data storage media (i.e., 5×10−3, 500 cm/J and 0.5% for Δnsat The polymerization shrinkage is reduced as low as 0.4% as a result of the late gelation in conversion. ) and material sensitivity (S) are as large as 1×10− cm/J, respectively. ![]() It is shown that while the nanoparticle-(thiol-ene)polymer composites exhibit high transparency, their saturated refractive index modulation (Δnsat ![]() Real-time Fourier transform spectroscopy and photocalorimetry are used to characterize the visible light curing kinetics of a thiol-ene monomer system consisting of secondary dithiol with high self-life stability and low odor and triene with rigid structure and high electron density. We report on the photopolymerization kinetics and volume holographic recording characteristics of silica nanoparticle-polymer composites using thiol-ene monomers capable of step-growth polymerization. We also demonstrate shift-multiplexed holographic storage of 80 digital data pages in a thiol-yne based NPC film with high readout fidelity. On the other hand, the thermal stability is improved better with the dispersion of SiO2 nanoparticles. We find that while the shrinkage of a volume hologram recorded in a thiol-yne based NPC dispersed with organic nanopartices can be as low as 0.5%, it is approximately 1% with the dispersion of SiO2 nanoparticles due to the plasticizing effect of the doped co-monomer. We show that a thiol-yne based NPC film dispersed with 25 vol.% SiO2 nanoparticles and 15 wt.% single functional co-monomer gives the saturated refractive index change as large as 0.008 and the material recording sensitivity as high as 2005 cm/J at a recording and readout wavelength of 532 nm. Because each alkyne functional group can react consecutively with two thiol functional groups in thiol-yne photopolymerizatins, the thiol-yne based NPC system dispersed with inorganic nanoparticles has the potentiality to overcome the drawback of low crosslinking densities but to retain the advantage of low shrinkage that is possible by use of thiol-ene photopolymerizations. ![]() We investigate volume holographic recording in a photopolymerizable nanoparticle-polymer (NPC) composite film that employs radical-mediated thiol-yne step-growth photopolymerizations. Finally, we show two examples of our holographic applications, holographic digital data storage and slow-neutron beam control. We then outline the holographic recording properties of volume gratings recorded in photopolymerizable nanocomposite materials consisting of inorganic/organic nanoparticles and monomers having various photopolymerization mechanisms. Experimental inspection of the recorded grating’s morphology by various physicochemical and optical methods is described. We discuss the mechanism of grating formation in holographically exposed nanocomposite materials, based on a model of the photopolymerization-driven mutual diffusion of monomer and nanoparticles. These findings offer a valuable way to design organic–inorganic hybrid materials combining multiple splendid physical properties and stimulate further exploration of the mutual relations between structures and physical properties.We present an overview of recent investigations of photopolymerizable nanocomposite photonic materials in which, thanks to their high degree of material selectivity, recorded volume gratings possess high refractive index modulation amplitude and high mechanical/thermal stability at the same time, providing versatile applications in light and neutron optics. 2 displays a SHG switch and a band gap of 3.00 eV, together with a piezoelectric response ( d 22 = 22 pC N −1). Remarkably, 1 presents a novel bi-step SHG switch and demonstrates semiconductor properties with a band gap of 2.49 eV. ![]() Moreover, the different proportions of reagents endow the two compounds with diverse structures and physical properties. The introduction of homochiral cations ensures that 1 and 2 crystallize in non-centrosymmetric and chiral space groups, realizing the combination of piezoelectricity and second harmonic generation (SHG) properties. Herein, we report two lead-free organic–inorganic hybrid materials, 2SbBr 5 ( 1) and 5Sb 4Br 17 ( 2), in a ratio of 3 : 2 and 1 : 1 of ( R)-pyrrolidin-3-ol and SbBr 3, respectively. Nonlinear optical (NLO) switches and piezoelectric materials have drawn widespread attention benefiting from the enormous potential applications in photonic technology devices and smart sensors. ![]()
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