Plasticizer-dispersed Photopolymer for Holographic Storage at 405 nm

Sasao, Norikatsu; Hirao, Akiko; Hayase, Rumiko; Matsumoto, Kazuki; Kamikawa, Takahiro; Terai, Masaya

doi:10.2494/photopolymer.19.431

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…[15][16][17] as well as of all-organic photopolymers. [18][19][20] Despite large Dn sat and high thermal stability of volume gratings recorded in (meth)acrylate-based NPCs, shrinkage was at best a few %, still larger than the required value (<0.5%) for HDS applications. 8 This is due to the fact that all these reported NPCs employed monomers capable of free radical mediated chain-growth polymerizations in which gelation takes place early in conversion since high-molecularweight polymer is formed immediately in the crosslinking polymerization process.…”

Section: Introductionmentioning

confidence: 95%

“…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). 38,39 The use of a blue diode laser provides higher storage capacity in HDS, [18][19][20][37][38][39] but the effect of grating distortions due to shrinkage on degradation in readout fidelity may become more significant than the case with a green laser. Therefore, we are now in a position to develop bluesensitive thiol-ene based NPCs with large Dn and low shrinkage.…”

Section: Introductionmentioning

confidence: 98%

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

Kawana

Takahashi

Yasui

et al. 2015

Journal of Applied Physics

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We report on the photopolymerization dynamics and the volume holographic recording properties of a thiol-ene based nanoparticle-polymer composite (NPC) doped with a blue-sensitive photoinitiator, Darocur V R TPO, by using a highly coherent blue diode laser operating at a wavelength of 404 nm. Our study indicates that volume gratings recorded in the NPC amount to meeting the material requirements of refractive index modulation and material recording sensitivity for holographic data storage media. It is also found that polymerization shrinkage of recorded NPC gratings is higher than that of the same thiol-ene based NPC with a green (523 nm)-sensitive photoinitiator, Irgacure V R 784/BzO 2 . We attribute such a difference in shrinkage to the photopolymerization dynamics at these recording wavelengths. We show that this shrinkage increase at 404 nm can be mitigated to some extent by controlling the thiol-ene stoichiometry in the NPC. V C 2015 AIP Publishing LLC. [http://dx.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 98%

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

Kawana

Takahashi

Yasui

et al. 2015

Journal of Applied Physics

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Photopolymerization kinetics and volume holographic recording in ZrO2 nanoparticle-polymer composites at 404 nm

Omura

Tomita

2010

Journal of Applied Physics

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We investigate volume holographic recording in a ZrO2 nanoparticle-polymer composite film at a wavelength of 404 nm. Dependences of the polymerization kinetics on concentrations of an initiator and ZrO2 nanoparticles doped in acrylate monomer are examined by using a photodifferential scanning calorimeter. It is found that there exists the optimum concentration of ZrO2 nanoparticles to maximize the polymerization rate. The diffraction and scattering properties of transmission volume gratings are also investigated. It is found that the refractive index modulation and the material recording sensitivity are as high as 8×10−3 and 9000 cm/J, respectively, at the optimum ZrO2 nanoparticle concentration of 35 vol % and at a recording intensity of 5 mW/cm2. These material parameters are larger than typical minimum ones of 5×10−3 and 500 cm/J, respectively, for optimized performance in holographic data storage.

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Study of Optical Properties of Glass-Like Polymer Material for Blue Laser Holographic Optic Data Storage Recording

Chen

Yang²,

Huang

et al. 2009

IEEE Trans. Magn.

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Plasticizer-dispersed Photopolymer for Holographic Storage at 405 nm

Cited by 5 publications

References 6 publications

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

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

Photopolymerization kinetics and volume holographic recording in ZrO2 nanoparticle-polymer composites at 404 nm

Study of Optical Properties of Glass-Like Polymer Material for Blue Laser Holographic Optic Data Storage Recording

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