Enhancement of Lithium Niobate nanophotonic structures via spin-coating technique for optical waveguides application

Fakhri, Makram A.; Wahid, M. H. A.; Badr, Ban A.; Kadhim, Suad M.; Salim, Evan T.; Hashim, U.; Salim, Zaid T.

doi:10.1051/epjconf/201716201004

Cited by 41 publications

(12 citation statements)

References 28 publications

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“…The XRD pattern shown in figure 3 informs the formation of phase pure tetragonal rutile and anatase, where 'A' and 'R' indicate anatase-phase crystals and rutile-phase crystals, respectively [18], as seen in the figure, for the energies 500, 600, 700, 800, 900, and 1000 mJ keeping this order the peaks for plane A(101) were located at 2θ = 24.8, 24.4, and not shown for the higher energies. For plane R( 110 The crystallite size (D) of all anatase and rutile peaks was calculated by using the Scherrer equation [19][20][21]…”

Section: Resultsmentioning

confidence: 99%

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Preparation and characterization of titanium dioxide using PLD at various energy of pulsed laser

Mohammed¹,

Fakhri²

2022

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Because of its distinctive optical and electrical characteristics, titanium dioxide (TiO2) thin films are one of the significant and promising semiconductor materials for environmental and energy applications. The effect of the laser pulse energy of Nd:YAG on the properties of TiO2 thin film grown on silicon and quartz substrates using the laser pulse deposition technique by the crystal structure, surface area, crystalline structure, average particle size, and porosity were summarised. The nano-thin film with the optimum condition has been prepared with a pulse laser energy of 900 mJ. The optical properties have been investigated using UV–vis spectrophotometer, morphological properties have been studied using atomic force microscopy and field emission scanning electron microscopy, and structural properties have been examined using x-ray diffractometer and Raman spectrometer. The tests and measurements have shown a crystalline structure, and the distribution of the grains was regular in the film. Raman spectroscopy showed two diffraction peaks corresponding to anatase Eg and rutile Eg. This observation is typically used in dye-sensitised solar cells, separation sensor devices, and more.

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Section: Resultsmentioning

confidence: 99%

“…where K is Scherrer's constant equal to 0.94 (depends on the crystal shape, equals 1 for spherical shape), λ is the wavelength of the x-ray and equals 0.15406 nm, β is the (FWHM) full width at half maximum of the peak (in Radians), and θ B represents the position of the peak. The dislocation density (δ) was calculated using [22][23][24]…”

Section: Resultsmentioning

confidence: 99%

Preparation and characterization of titanium dioxide using PLD at various energy of pulsed laser

Mohammed¹,

Fakhri²

2022

Adv. Nat. Sci: Nanosci. Nanotechnol.

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“…The HF concentration in the HF: ethanol electrolyte was fixed at 40% by applying the dilution equation [40][41][42][43]:…”

Section: -Porous Silicon Fabricationmentioning

confidence: 99%

“…1064 nm deposition wavelength sample showed four peaks at 2θ of 27.52 (R 110), 35.92 (A 103), 36.08 (A 004), and 61.76 (R 002) degrees, the 532nm deposition wavelength sample showed three peaks at 2θ of 27.36 (R 110), 36.36 (A 103), and became more apparent when the laser wavelength was changed from 1064 nm to 532 nm and 355 nm, indicating that the lower wavelength depositions were more uniform and the TiO 2 crystals were better distributed. Scherrer equation was used to calculate the crystallite size (D) of anatase and rutile crystals [48][49][50][51][52]…”

Section: -Deposition Parameters Optimization (Different Wavelengths)mentioning

confidence: 99%

Improved solar cell efficiency of titanium dioxide on porous silicon using pulsed laser deposition at different laser wavelengths

Fakhri,

Salim,

Mohammed

et al. 2023

Phys. Scr.

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In this study, a Q-switched Nd:YAG laser with specific parameters, including a pulse repetition rate of 6 Hz, a pulse duration of 10 nm, a wavelength of 532 nm, and a laser fluence of 237.47 J cm−12, was employed to fabricate highly crystalline TiO2 nano-films. These nano-films exhibited a narrow energy band gap of 3.24 eV and showcased favorable surface morphology, characterized by a roughness of 2.38 nm. A solar cell device was produced by creating porous silicon (PSi) and applying titanium dioxide films onto the PSi, achieving a notable conversion efficiency of 8.733%. To investigate the impact of different parameters on the resulting TiO2 nano-films, a range of laser fluences (ranging from 131.93 to 263.85 J cm−12) and three distinct laser wavelengths (1064 nm, 532 nm, and 355 nm) were employed during the pulsed laser deposition (PLD) process. These experiments aimed to grow TiO2 films on both quartz and silicon (Si) substrates.

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“…PLAL, which stands for metal or metal oxide-NCs, has recently been acknowledged as the most adaptable, promising, and straightforward technique for producing such materials. An instance of the effective use of the Nd:YAG laser is the creation of Ag nanoparticle-decorated carbon nanotubes (CNTs) to enhance the photocatalytic efficacy in the removal of naphthalene from 67 – 79 water 80 and MWCNTs/Ag NCs for catalytic degradable material for nitro compounds and dyes 81 . The PLAL process has many benefits, including simplicity, low cost, a decrease in by-product generation, the absence of catalyst and vacuum requirements, high-purity nanomaterial manufacturing, and precise control over particle shape and size by modifying laser settings.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous Ag@WO3 core–shell, an investigation at different concentrated environment employing laser ablation in liquid

Salim,

Saimon,

Muhsin

et al. 2024

Sci Rep

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In this study, silver-tungsten oxide core–shell nanoparticles (Ag–WO3 NPs) were synthesized by pulsed laser ablation in liquid employing a (1.06 µm) Q-switched Nd:YAG laser, at different Ag colloidal concentration environment (different core concentration). The produced Ag–WO3 core–shell NPs were subjected to characterization using UV–visible spectrophotometry, X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive spectroscopy, electrical analysis, and photoluminescence PL. The UV–visible spectra exhibited distinct absorption peaks at around 200 and 405 nm, which attributed to the occurrence of surface Plasmon resonance of Ag NPs and WO3 NPs, respectively. The absorbance values of the Ag–WO3 core–shell NPs increased as the core concentrations rose, while the band gap decreased by 2.73–2.5 eV, The (PL) results exhibited prominent peaks with a central wavelength of 456, 458, 458, 464, and 466 nm. Additionally, the PL intensity of the Ag–WO3-NP samples increased proportionally with the concentration of the core. Furthermore, the redshift seen at the peak of the PL emission band may be attributed to the quantum confinement effect. EDX analysis can verify the creation process of the Ag–WO3 core–shell nanostructure. XRD analysis confirms the presence of Ag and WO3 (NPs). The TEM images provided a good visualization of the core-spherical shell structure of the Ag–WO3 core–shell NPs. The average size of the particles ranged from 30.5 to 89 (nm). The electrical characteristics showed an increase in electrical conductivity from (5.89 × 10−4) (Ω cm)−1 to (9.91 × 10−4) (Ω cm)−1, with a drop in average activation energy values of (0.155 eV) and (0.084 eV) at a concentration of 1.6 μg/mL of silver.

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Enhancement of Lithium Niobate nanophotonic structures via spin-coating technique for optical waveguides application

Cited by 41 publications

References 28 publications

Preparation and characterization of titanium dioxide using PLD at various energy of pulsed laser

Preparation and characterization of titanium dioxide using PLD at various energy of pulsed laser

Improved solar cell efficiency of titanium dioxide on porous silicon using pulsed laser deposition at different laser wavelengths

Mesoporous Ag@WO3 core–shell, an investigation at different concentrated environment employing laser ablation in liquid

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