The structure and optical properties of Lithium Niobate grown on quartz for photonics application

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

doi:10.1051/epjconf/201716201005

Cited by 30 publications

(3 citation statements)

References 24 publications

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“…The spectrum exhibited distinct and broad absorption peaks in the visible region, located at approximately 414, 416, 415, 417, and 417 nm for the samples with concentrations of 0.36, 0.76, 1.2, 1.6, and 1.96 μg/mL, respectively. In agreement with one of the previous studies 101 , 102 . The intensities of all distinctive peaks, which were seen in the Ag–WO 3 NPs samples, exhibit an increase when the amounts of silver particles are increased.…”

Section: Resultssupporting

confidence: 94%

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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Section: Resultssupporting

confidence: 94%

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

Salim,

Saimon,

Muhsin

et al. 2024

Sci Rep

Self Cite

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“…As shown in Fig. 2, the LN peaks at 2θ = 23.68°, 32.64°, 34.62°, 47.54° and 54.31° correspond to the (012), (104), (110), (024) and (116) planes, respectively [60][61][62][63][64][65] . Table 1 lists the structural properties of pure and Ag-decorated LN nanophotonics that must be measured.…”

Section: Resultsmentioning

confidence: 89%

Silver decorated lithium niobat nanostructure by UV activation method for silver–lithium niobate/silicon heterojunction device

Salim

Khalef

Fakhri

et al. 2023

Sci Rep

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Lithium niobite (LiNbO3) nanostructure were successfully synthesized by chemical bath deposition method (CBD) and then decorated with silver nitrate (AgNO3) through UV activation method at different immersion durations (5, 15, 25, 35, and 45 s). The silver nanoparticles (AgNPs) effects on the optical and structural properties were studied and analyzed using various scientific devices and technique. X-ray diffraction (XRD) results showed that all the samples have a hexagonal structure with a maximum diffraction peak at the (012), and the existence of silver atoms could be recognized at 2θ = 38.2° which corresponds to the (111) diffraction plane. The optical absorption of nanocomposites depicted the presence of plasma peak related to silver (Ag) at 350 nm. The estimated energy gap from the optical absorption revealed a reduction in the Eg value from (3.97 eV) to (3.59 eV) with the presence of Ag atom. The Photolumincence (PL) peaks were observed at around 355 nm for pure LiNbO3/Si and 358, 360, 363, 371, 476 nm for different immersion durations respectively, in the visible region of the electromagnetic spectrum. The scanning electron microscopy (SEM) study illustrated that with increasing the immersion time, especially at 45 s, a change in the particle morphology was observed (LiNbO3 NRs structure). Atomic force microscopy (AFM) displayed that the surface roughness decreases from 80.71 nm for pure sample to 23.02 nm for the decorated sample as the immersion time is increased. FT-IR manifested a noticeable increase in the intensity of the peaks of samples decorated with AgNPs. Raman spectroscopy elucidated that the peaks shifted to higher intensity due to the plasmonic effect of Ag nanoparticles. Ag–LiNbO3/Si heterojunction nano-devices were fabricated successfully and enhanced the optoelectronic properties in comparison with the pure LiNbO3/Si heterojunction device.

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“…E = hv is the incident photon energy if we write it as a function of the wavelength (λ) will give [13,14] g ( ) =…”

Section: 2theorymentioning

confidence: 99%

Synthesis of LN/Si Nanostructures Layer by LayerBased on Mach-Zehnder Modulator using Pulsed Laser Deposition

Mohammed

Fakhri

Abass

et al. 2021

Preprint

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A Mach-Zehnder electro-optic modulator (EOM) was fabricated employing pulsed laser deposition (PLD) method. Lithium Niobate (LN) was bonded to silicon nanocrystal substrate such that a waveguide combined structures were obtained. The over-all Properties of prepared device were investigated. The formation of LN was ensured by the x-ray diffraction results were the formation of ∆ phase was confirmed by the diffraction of x-rays from the (012) and (302) diffraction plans. The AFM results reflect the formation of highly uniform nanostructured with maximum roughness of about 12.9 nm. The constructed device shows that the recent improvements in hybrid MZ modulators using pulse laser deposition PLD and different electro-optic material have shown low loss and wide modulation bandwidth.

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The structure and optical properties of Lithium Niobate grown on quartz for photonics application

Cited by 30 publications

References 24 publications

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

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

Silver decorated lithium niobat nanostructure by UV activation method for silver–lithium niobate/silicon heterojunction device

Synthesis of LN/Si Nanostructures Layer by LayerBased on Mach-Zehnder Modulator using Pulsed Laser Deposition

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