Two-wavelength volume holographic recording in thick PQ-doped PMMA photopolymer

Lin, June Hua; Hsu, Ken Yuh; Lin, Shiuan Huei

doi:10.1117/12.2017315

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…Sample preparation. First, the materials were prepared using the method in Figure S1 , based on previously reported preparation methods [ 17 , 32 , 33 , 34 , 35 , 36 ]. In this process, 100 wt% of the monomer MMA was used for the substrate preparation; AIBN, where the weight used was based on MMA 1%, was used for free radical initiation; and the crosslinking agent PETA was blended, where the weight used was based on MMA 10%; while PQ, where the weight used was based on MMA 1%, for photoreactivity was added for grating initiation before curing.…”

Section: Methodsmentioning

confidence: 99%

Sensitivity-Enhancing Modified Holographic Photopolymer of PQ/PMMA

Wu,

Jin,

et al. 2024

Polymers

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Phenanthrenequinone-doped poly(methyl methacrylate) (PQ/PMMA) photopolymers are potential holographic storage media owing to their high-density storage capacities, low costs, high stability, and negligible shrinkage in volume holographic permanent memory. However, because of the limitations of the substrate, conventional Plexiglas materials do not exhibit a good performance in terms of photosensitivity and molding. In this study, the crosslinked structure of PMMA was modified by introducing a dendrimer monomer, pentaerythritol tetraacrylate (PETA), which increases the photosensitivity of the material 2 times (from ~0.58 cm/J to ~1.18 cm/J), and the diffraction efficiency is increased 1.6 times (from ~50% to ~80%). In addition, the modified material has a superior ability to mold compared to conventional materials. Moreover, the holographic performance enhancement was evaluated in conjunction with a quantum chemical analysis. The doping of PETA resulted in an overall decrease in the energy required for the reaction system of the material, and the activation energy decreased by ~0.5 KJ/mol in the photoreaction stage.

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Section: Methodsmentioning

confidence: 99%

Sensitivity-Enhancing Modified Holographic Photopolymer of PQ/PMMA

Wu,

Jin,

et al. 2024

Polymers

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Two-wavelength holographic recording in photopolymer using four-energy-level system: experiments and modeling

et al. 2014

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Abstract. We investigate a two-wavelength method for recording a persistent hologram in a doped photopolymer. The recording method is based on two separated optical excitations of the four-energy-level system of the doped element, one at λ ¼ 325 nm as the sensitizing wavelength and the other at λ ¼ 647 nm as the writing wavelength, allowing for an experimental demonstration of nondestructive readout in phenanthrenequinonedoped poly(methyl methacrylate). Further, a four-energy-level rate equations model is proposed for describing the dynamics of hologram recording. The model successfully explains our experimental finding and further provides a general method to investigate such a two-wavelength holographic recording in photopolymer. © The Authors.Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Two-wavelength volume holographic recording in thick PQ-doped PMMA photopolymer

Cited by 2 publications

References 12 publications

Sensitivity-Enhancing Modified Holographic Photopolymer of PQ/PMMA

Sensitivity-Enhancing Modified Holographic Photopolymer of PQ/PMMA

Two-wavelength holographic recording in photopolymer using four-energy-level system: experiments and modeling

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