Top-Performance Transmission Gratings with Haloalkanes-Based Polymeric Composite Materials

We report on highly transparent holographic phase transmission volume gratings recorded in the visible region at λ = 532 nm. The maximum measured diffraction efficiency is higher than 80% with a grating pitch of Λ≈ 300 nm and a refractive index modulation Δn ≈ 0.018. To obtain these results, we used...

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Bibliographic Details
Published in:Materials 2022-12, Vol.15 (23), p.8638
Main Authors: Castagna, Riccardo, Riminesi, Cristiano, Di Donato, Andrea, Francescangeli, Oriano, Lucchetta, Daniele Eugenio
Format: Article
Language:English
Subjects:
Butane
Composite materials
Data storage
Diffraction efficiency
Efficiency
Free radicals
Hexanes
Holography
Integrated optics
Lasers
Light
Photopolymerization
Polymer matrix composites
Polymerization
Polymers
Quinones
Refractivity
Sensors
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Summary:We report on highly transparent holographic phase transmission volume gratings recorded in the visible region at λ = 532 nm. The maximum measured diffraction efficiency is higher than 80% with a grating pitch of Λ≈ 300 nm and a refractive index modulation Δn ≈ 0.018. To obtain these results, we used a holographic mixture based on multi-reticulated acrylate and haloalkanes (1-bromo-butane and 1-bromo-hexane) and a synergic combination of camphore-quinone, which has a maximum absorbance at c.a. 470 nm, and R6G, here used as co-initiator, to efficiently initiate the photo-polymerization process. High transparent and high efficient holographic structures based on polymers can find applications in many research fields including integrated optics, sensors, high density data storage and security.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15238638