Compositional Changes for Reduction of Polymerisation-Induced Shrinkage in Holographic Photopolymers

Polymerisation-induced shrinkage is one of the main reasons why many photopolymer materials are not used for certain applications including holographic optical elements and holographic data storage. Here, two compositional changes for the reduction of shrinkage in an acrylamide-based photopolymer are reported. A holographic interferometric technique was used to study changes in the dynamics of the shrinkage processes occurring in the modified photopolymer during holographic recording in real time. Firstly, the effect of the replacement of the acrylamide monomer in the photopolymer composition with a larger monomer molecule, diacetone acrylamide, on polymerisation-induced shrinkage has been studied. A reduction in relative shrinkage of 10–15% is obtained using this compositional change. The second method tested for shrinkage reduction involved the incorporation of BEA-type zeolite nanoparticles in the acrylamide-based photopolymer. A reduction in relative shrinkage of 13% was observed for acrylamide photopolymer layers doped with 2.5% wt. BEA zeolites in comparison to the undoped photopolymer.

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DOPED POLY(METHYL METHACRYLATE) PHOTOPOLYMERS FOR HOLOGRAPHIC DATA STORAGE

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863506003244 ◽

2006 ◽

Vol 15 (02) ◽

pp. 239-252 ◽

Cited By ~ 24

Author(s):

SHIUAN HUEI LIN ◽

JUNE-HUA LIN ◽

PO-LIN CHEN ◽

YI-NAN SHIAO ◽

KEN Y. HSU

Keyword(s):

Methyl Methacrylate ◽

Data Storage ◽

Physical Mechanism ◽

Dynamic Range ◽

Optical Quality ◽

Holographic Recording ◽

Holographic Data Storage ◽

Poly Methyl Methacrylate ◽

Recording Material ◽

Good Optical Quality

In this paper, we report our investigations on thick holographic recording material of the phenanthrenequinone doped poly(methyl methacrylate) (PQ:PMMA) photopolymer. The design strategy and fabrication technique for making thick polymer samples with negligible shrinkage and good optical quality are presented. The physical mechanism for holographic recording in PQ:PMMA material is described, and methods for improving are proposed. Based on these methods, photopolymer samples with different compositions are fabricated and experimentally characterized. The results show that by modifying compositions, the material sensitivity and dynamic range for volume holographic recording have been improved.

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Dynamic behavior of azobenzene polyester used for holographic data storage

MRS Proceedings ◽

10.1557/proc-674-v3.4 ◽

2001 ◽

Vol 674 ◽

Cited By ~ 1

Author(s):

Árpád Kerekes ◽

E. Lörincz ◽

Sz. Sajti ◽

P. Várhegyi ◽

P. S. Ramanujam ◽

...

Keyword(s):

Dynamic Behavior ◽

Data Storage ◽

Intensity Ratio ◽

Holographic Recording ◽

Holographic Data Storage ◽

Thick Sample ◽

Model Experiments ◽

Optimal Intensity ◽

532 Nm ◽

Higher Sensitivity

ABSTRACTDynamic behavior of thin photoaddressable polyester films was studied. The saturation process due to Fourier holographic recording was investigated. Model experiments show an optimal intensity ratio of the object and reference beams, where the highest efficiency occurs. This ratio is inversely proportional to the reference intensity. The material has a significantly higher sensitivity at 407 nm than at 532 nm. For 1 μm thick sample an M# of 0.25 was measurable.

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Birefringence improvement in azopolymer doped with MFI zeolite nanoparticles

Optofluidics Microfluidics and Nanofluidics ◽

10.2478/optof-2014-0005 ◽

2014 ◽

Vol 1 (1) ◽

Cited By ~ 4

Author(s):

Dimana Nazarova ◽

Lian Nedelchev ◽

Svetlana Mintova

Keyword(s):

Composite Materials ◽

High Efficiency ◽

Inorganic Nanoparticles ◽

Inorganic Materials ◽

Side Chain ◽

Holographic Recording ◽

Diffractive Optical Elements ◽

Mfi Zeolite ◽

Optical Elements ◽

Type Zeolite

AbstractHybrid organic/inorganic materials based on combination of polymers and inorganic nanoparticles (NP) attract considerable attention due to their advantageous electrical, optical, or mechanical properties. Recently it was reported that doping photopolymers with nanoparticles allows to achieve near 100% net diffraction efficiency in case of conventional holographic recording. Thus, we have synthesized novel organic/inorganic composite materials by incorporating MFI (Mordenite Framework Inverted) type zeolite nanoparticles in an amorphous side-chain azopolymer. A considerable improvement of the photoresponse in thin films of these composite materials has been observed compared to the non-doped samples - nearly 25% increase of the saturated value of the birefringence.Moreover the photoinduced birefringence is stable in time which allows these materials to be used as media for diffractive optical elements with high efficiency and unique polarization properties.

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