Polarization holographic gratings in PAZO polymer films doped with particles of biometals

Stoilova, Ani; Mateev, Georgi; Nazarova, Dimana; Nedelchev, Lian; Stoykova, Elena; Blagoeva, Blaga; Berberova, Nataliya; Georgieva, Stela; Todorov, Petаr

doi:10.1016/j.jphotochem.2021.113196

Cited by 10 publications

(25 citation statements)

References 16 publications

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“…Thus, toxic organic solvents, which are usually required for film deposition of other azopolymers, can be avoided. Furthermore, the water solubility of PAZO allows for easy preparation of photoanisotropic nanocomposite layers containing PAZO and nanoparticles such as silver and gold nanoparticles [ 14 , 15 ], goethite nanorods [ 16 ], biologically active metal complexes [ 17 ], etc. These nanocomposite materials show enhanced photo response, higher birefringence, increased diffraction efficiency and higher surface relief modulation compared with non-doped polymer.…”

Section: Introductionmentioning

confidence: 99%

“…These nanocomposite materials show enhanced photo response, higher birefringence, increased diffraction efficiency and higher surface relief modulation compared with non-doped polymer. For most of its optical applications, the azopolymer PAZO is deposited as thin films with a thickness ranging from several nanometers to several microns [ 7 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

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Hybrid Dispersion Model Characterization of PAZO Azopolymer Thin Films over the Entire Transmittance Spectrum Measured in the UV/VIS/NIR Spectral Region

et al. 2022

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Notwithstanding the significant optical applicability of PAZO polymer films, there are no accurate data about their optical characteristics. To remedy this shortcoming, in this study three PAZO polymer thin films are characterized, with dissimilar thicknesses, on glass substrates using only one UV/VIS/NIR transmittance spectrum T(λ) per sample and an original hybrid dispersion model (HDM). HDM is based on the Tauc‒Lorentz model, the new amorphous dispersion formula, the Tauc‒Lorentz‒Urbach model of Foldyna and the Tauc‒Lorentz‒Urbach model of Rodriguez. HDM with two oscillators is employed in characterizations of the PAZO polymer films in the range [300, 2500] nm, whereby the root-mean-square deviation (RMSD) of the fitted transmittance spectrum with respect to T(λ) does not exceed 1.6 × 10−3. Decreasing RMSD by 2.3% to 94.4% is demonstrated by employing HDM compared with the above mentioned four popular dispersion models, for each one of the studied films. HDM is applicable to amorphous films independent of their thickness as well as to cases of non-transparent substrate.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hybrid Dispersion Model Characterization of PAZO Azopolymer Thin Films over the Entire Transmittance Spectrum Measured in the UV/VIS/NIR Spectral Region

et al. 2022

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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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“…Many important advances in Science and Technology are obtained by using composite polymer materials [ 1 , 2 , 3 , 4 , 5 , 6 , 7 ]. Holographic gratings made by composite polymer materials are one of the most intriguing technological achievements of the last few decades [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. In this context, a pivotal role is played by multi-acrylates or multi-functionalized polymer materials that, after polymerization, can give rise to highly reticulated polymer matrices.…”

Section: Introductionmentioning

confidence: 99%

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

Castagna

Riminesi²,

Donato

et al. 2022

Materials

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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.

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Polarization holographic gratings in PAZO polymer films doped with particles of biometals

Cited by 10 publications

References 16 publications

Hybrid Dispersion Model Characterization of PAZO Azopolymer Thin Films over the Entire Transmittance Spectrum Measured in the UV/VIS/NIR Spectral Region

Hybrid Dispersion Model Characterization of PAZO Azopolymer Thin Films over the Entire Transmittance Spectrum Measured in the UV/VIS/NIR Spectral Region

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

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

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