Nanodiamond-based nanoparticle-polymer composite gratings with extremely large neutron refractive index modulation

Hadden, Elhoucine; Iso, Yuko; Kume, Atsushi; Umemoto, Koichi; Jenke, Tobias; Fally, Martin; Klepp, Jürgen; Tomita, Yasuo

doi:10.1117/12.2623661

Cited by 5 publications

(5 citation statements)

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“…70 with improved properties reported only recently. 73 Experiments using a SANS setup at the PF2/VCN beamline showed diffraction efficiencies of η 1 ≈ 70% and η 2 ≈ 30% at their corresponding Bragg angles. The coherent scattering length densities for the first and the second orders extracted from these data are remarkable even if an attenuation of the grating along the depth is observed: ∆[b c ρ] 1 = 11.7 µm −2 and ∆[b c ρ] 2 = 5.2 µm −2 , respectively.…”

Section: Nanoparticle Polymer Compositesmentioning

confidence: 98%

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Photosensitive materials for neutron optics

Fally,

Klepp,

Pruner

et al. 2024

Photosensitive Materials and Their Applications III

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Photosensitive materials with ever-improving properties are of great importance for optical and photonics applications. Additionally, they are extremely useful for designing components for neutron optical devices. We provide an overview on materials that have been tested and successfully used to control beams of cold and very cold neutrons based on diffractive elements. Artificial gratings are generated and optimized for the specific application in mind. We discuss the needs of the neutron optics community and highlight the progress obtained during the last decade. Materials that have been employed so far along with their properties are summarized, outlining the most promising candidates for the construction of an interferometer for very cold neutrons.

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Section: Nanoparticle Polymer Compositesmentioning

confidence: 98%

“…Some of these materials were tested, characterized and applied also for neutron optic purposes [62][63][64][65][66][67][68] and only recently nanodiamond polymer-composites were even designed for use in neutron optics. 38,[69][70][71][72][73] Some of the most important advantages of using NPCs are:…”

Section: Nanoparticle Polymer Compositesmentioning

confidence: 99%

Photosensitive materials for neutron optics

Fally,

Klepp,

Pruner

et al. 2024

Photosensitive Materials and Their Applications III

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“…12 Other organic nanoparticles using carbon allotropes such as nanodiamond and carbon nanotube were also reported very recently. [13][14][15] We developed holographic NPC gratings using various types of HBPs (refractive indices of 1.51 and 1.61 at 532 nm) and photopolymers with free radical mediated chain-growth, cationic ring-opening and thiol-ene polymerizations. 12,16,17 In all these works holographic NPC gratings of 1-µm spacing were recorded in the green (532 nm) and they had ∆n sat as large as 8×10 −3 at a readout wavelength of 532 nm.…”

Section: Introductionmentioning

confidence: 99%

Panchromatic recording of nanocomposite holographic gratings with large refractive index modulation amplitudes

Tomita,

Narita,

Hasegawa

2024

Photosensitive Materials and Their Applications III

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A photopolymerizable nanoparticle-polymer composite (NPC) is a novel nanocomposite photopolymer that is dispersed with inorganic nanoparticles having a large refractive-index difference from that of the formed polymer. In order to realize the uniform and high dispersion of nanoparticles without any aggregation, we employ nanostructured polymers that possess highly branched main chains, the so-called hyperbranched polymer (HBP), as size and refractive-index controllable organic nanoparticles with its ultrahigh refractive index. We show that high dispersion of the ultrahigh refractive index HBP in a photopolymerizable NPC provides a volume holographic grating possessing the saturated refractive modulation amplitude as large as 0.03 at grating spacing of 0.5-µm in all the visible spectral regions of the red (640nm), the green (532nm) and the blue (405nm). Such a high contrast volume holographic grating can be used for volume optical holographic elements in a wearable headset for augmented and mixed reality.

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“…Composite materials are crucial in the fabrication process of displacement and/or pressure sensors. Holographic gratings made by composite polymers represent the most intriguing technological achievement in the field of optical holography over the last few decades [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. An important role in the fabrication of holographic phase gratings is played by multi-acrylate materials that, once polymerized, give rise to a highly interconnected polymer network.…”

Section: Introductionmentioning

confidence: 99%

On the Use of Haloalkane/Acrylate-Based Holographic Gratings as Compression and Rotation Sensors

Castagna

Riminesi²,

Donato

et al. 2022

Sensors

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In this work, we test the effectiveness of using highly transparent holographic phase reflection and transmission volume gratings based on multifunctional acrylates as linear compression and rotation sensors. The gratings are recorded in a holographic mixture based on multi-reticulated acrylate and haloalkanes. To activate the photo-polymerization process, we used a mixture of 6-oxocamphore and rhodamine 6G. The mixture is a simplified version of the mixture used in previous works and shows some interesting features mainly in connection with the different roles played by the rhodamine 6G dye at different writing wavelengths λ = 532 nm and λ = 460 nm. Regarding reflection gratings, the maximum achieved diffraction efficiency is ≈50% and their use as linear compression sensors produces a shift in the reflection peak of 2 nm. Following the removal of compression, the grating slowly returns to the initial state. Regarding transmission gratings, the maximum achieved diffraction efficiency is ≈45% and they demonstrate very high sensitivity to even small rotations in a free-standing configuration.

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Nanodiamond-based nanoparticle-polymer composite gratings with extremely large neutron refractive index modulation

Cited by 5 publications

References 0 publications

Photosensitive materials for neutron optics

Photosensitive materials for neutron optics

Panchromatic recording of nanocomposite holographic gratings with large refractive index modulation amplitudes

On the Use of Haloalkane/Acrylate-Based Holographic Gratings as Compression and Rotation Sensors

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