Enhanced diffraction efficiency of polarization holographic gratings in Au nanoparticles-doped methyl orange film

doi:10.1117/1.oe.56.11.117105

Cited by 2 publications

(4 citation statements)

References 21 publications

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“…From the analysis of Table 2, it can be seen that an increase in photoinduced birefringence has been reported by many researchers, with the largest increase in over 40% obtained in [129,137,139,146,150,157,159,160]. For comparison and evaluation of the results, however, the value of the maximum achieved birefringence is more important.…”

Section: Summary and Discussionmentioning

confidence: 81%

“…Nanoparticles with different compositions have attracted the attention of researchers as possible dopant components, such as quantum dots (QDs) [134][135][136], carbon nanotubes (CNTs), and carbon nanofibers (CNFs) [137,138], ZnO [128,[139][140][141][142], SiO 2 [143,144], TiO 2 [145][146][147][148], semiconductor nanoparticles like tellurium containing chalcogenide system (GeTe 4 ) 100−x Cu x [149] and goethite (α-FeOOH) nanorods [129,150], nanozeolites [151], and upconverting nanoparticles (UCNPs) [152]. Gold (Au) and silver (Ag) NPs are the most commonly used metallic nanoparticles [132,146,[153][154][155][156][157][158][159][160][161]. Studies have also been conducted with bioactive metals, such as copper and nickel (Cu, Ni) [162,163].…”

Section: Nanoparticlesmentioning

confidence: 99%

“…Yang et al [159] in 2017 studied polarization holographic gratings recorded in similar nanocomposites, namely methyl orange/polyvinylpyrrolidone (MO/PVP) film doped with Au spherical nanoparticles with size 5-18 nm. Their results indicate that the diffraction efficiency of the gratings recorded in the NCs can increase 3.2 times compared with those inscribed in pure MO film.…”

Section: Gold (Au) Nanoparticlesmentioning

confidence: 99%

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Nanocomposite Photoanisotropic Materials for Applications in Polarization Holography and Photonics

Nazarova,

Nedelchev,

Berberova-Buhova

et al. 2023

Nanomaterials

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Photoanisotropic materials, in particular azodyes and azopolymers, have attracted significant research interest in the last decades. This is due to their applications in polarization holography and 4G optics, enabling polarization-selective diffractive optical elements with unique properties, including circular polarization beam-splitters, polarization-selective bifocal lenses, and many others. Numerous methods have been applied to increase the photoinduced birefringence of these materials, and as a result, to obtain polarization holographic elements with a high diffraction efficiency. Recently, a new approach has emerged that has been extensively studied by many research groups, namely doping azobenzene-containing materials with nanoparticles with various compositions, sizes, and morphologies. The resulting nanocomposites have shown significant enhancement in their photoanisotropic response, including increased photoinduced birefringence, leading to a higher diffraction efficiency and a larger surface relief modulation in the case of polarization holographic recordings. This review aims to cover the most important achievements in this new but fast-growing field of research and to present an extensive comparative analysis of the result, reported by many research groups during the last two decades. Different hypotheses to explain the mechanism of photoanisotropy enhancement in these nanocomposites are also discussed. Finally, we present our vision for the future development of this scientific field and outline its potential applications in advanced photonics technologies.

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Section: Summary and Discussionmentioning

confidence: 81%

Section: Nanoparticlesmentioning

confidence: 99%

Section: Gold (Au) Nanoparticlesmentioning

confidence: 99%

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Nanocomposite Photoanisotropic Materials for Applications in Polarization Holography and Photonics

Nazarova,

Nedelchev,

Berberova-Buhova

et al. 2023

Nanomaterials

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“…GNRs exhibit very high photothermal efficiency (μ ≈ 1) as the amplitude of the scattered radiation is almost negligible, and consequently all the absorbed light is converted into heat. In the past years, we have explored the possibility to use liquid crystalline materials for detecting the thermoplasmonic heating. − Also LC-based diffraction gratings containing gold NPs have been investigated in recent years. − However, the possibility of realizing thermoplasmonic controlled diffraction gratings is definitely a new application and yet unexplored. To this purpose, we show the first experimental evidence of reverse mode diffraction gratings activated by means of a thermoplasmonic mechanism.…”

Section: Introductionmentioning

confidence: 99%

Thermoplasmonic Activated Reverse-Mode Liquid Crystal Gratings

Sio

Lloyd

Tabiryan

et al. 2019

ACS Appl. Nano Mater.

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A new generation of reconfigurable optical components is conceived by bridging the photothermal properties of gold nanoparticles and the thermosensitivity of liquid crystalline materials. As such, gold nanorods (GNRs) heated using light are used to activate efficient hidden diffraction gratings realized in a blend made of a room temperature polymerizable liquid crystal (PLC) and nematic liquid crystal (NLC). Holographic liquid crystal polymer dispersed liquid crystal (HLCPDLC) gratings containing a small percentage of GNRs are fabricated with periodicity of 2.6 μm by means of a conventional UV holographic recording setup. The HLCPDLC structures are characterized using morphological, optical, and thermooptical techniques. Because of the initial refractive index match between the polymer-rich and LC-rich regions, the “grating” is hidden and the films appear transparent and nondiffractive. Illumination of these GNR-containing structures with a suitable light source (808 nm) induces a local heating due to the plasmonic absorption of the GNRs. This heating induces a refractive index mismatch between the PLC and the NLC as the latter undergoes a phase transition from nematic to isotropic, finally resulting in a transmission diffractive structure activated over a few seconds exhibiting an efficiency of about 70%. The same HLCPDLC samples have also been tested as thermosensitive waveplates, enabling a new, fast methodology for quantifying the photoinduced plasmonic heating with a thermal sensitivity of ∼0.04 °C. Moreover, thermoplasmonic driven waveplates represent a new avenue in the field of light controllable optical phase modulators.

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Enhanced diffraction efficiency of polarization holographic gratings in Au nanoparticles-doped methyl orange film

Cited by 2 publications

References 21 publications

Nanocomposite Photoanisotropic Materials for Applications in Polarization Holography and Photonics

Nanocomposite Photoanisotropic Materials for Applications in Polarization Holography and Photonics

Thermoplasmonic Activated Reverse-Mode Liquid Crystal Gratings

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