Optical reflectance, optical refractive index and optical conductivity measurements of nonlinear optics for l-aspartic acid nickel chloride single crystal

Anbazhagan, G.; Joseph, P. S.; Shankar, G.

doi:10.1016/j.optcom.2012.10.073

Cited by 18 publications

(4 citation statements)

References 20 publications

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α

, can be evaluated by correlate the intensity of the incident probe wave from the fabricated polymeric sheets, I, to that of the transmitted beam (I o ) 32 :

\log (\frac{true}{I}) = - αd,

Where d is the thickness of the blended polymer sheets, log( I/I o ) is the optical absorbance [Abs(λ)], and α is the coefficient of optical absorption, calculated according to the Beer–Lambert law 33 :

α = 2.303 . \frac{Abs (λ)}{d (italiccm)},

Equation (6) was utilized to calculate the value of α. The most probable transitions between the (HOMO–LUMO) is investigated by using the Tauc's relation, 34 which elucidates the difference between the energy of the probe wave, hυ, and the energy of the optical bandgap, E g , against the

{((), αhυ)}^{2}

and

{((), αhυ)}^{0.5}

to estimate direct or indirect transition, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…According to the analyzed optical absorption spectrum of the fabricated PVP/PVA blends the studied spectrum can be divided into two regions: at higher energies (I), where the absorption edge can be investigated to estimate the type of transition, evolve the energy gap, and calculate the Urbach's tail, (II). The optical absorption coefficient, α, can be evaluated by correlate the intensity of the incident probe wave from the fabricated polymeric sheets, I, to that of the transmitted beam (I o )32 :…”

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confidence: 99%

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Fabrication, microstructure, and nonlinear/linear optical parameters of polymeric‐based poly(vinyl alcohol)/poly(vinyl pyrrolidone) nanocomposites films for optical attenuation applications

Nawar

Ali

Khairy

et al. 2022

Polymers for Advanced Techs

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Herein, a novel proposed optical attenuator poly(vinyl alcohol)/poly(vinyl pyrrolidone) (PVA/PVP) doped PbS (NPs) nanoparticles nanocomposites films. The samples are fabricated by casting‐method to analyze the linear optical properties and estimate the nonlinear optical parameters. The crystal and molecular structure of the fabricated nanocomposites thick (PVA/PVP) films of different PbS (NPs) doping ratios were analyzed by XRD technique and FT‐IR, respectively. The semi‐crystalline nature of the fabricated PVA/PVP is influenced through all samples and the crystallinity is increased. The particle size of PbS (NPs) is increased in the doped samples and the strain parameter is increased. The measured transmission of the fabricated PVA/PVP doped PbS (NPs) films are decreased as the doping ratio of PbS (NPs) is increased. The absorption coefficient is incremented and shows large absorption values in the UV regions, may be utilized in UV‐blocking for saving the human skin, dramatically, and a noticed red‐shift in the edge of absorption for all samples as the doping ratio is increased. The most probable transition is indirect, and the evolved values of the energy gaps between HOMO and LUMO levels are decrement from 3.97 to 2.65 eV as doping ratio of PbS (NPs) is increased. Different models are utilized to evaluate the average values of the real refractive index (2.175–2.438). The fabricated PVA/PVP doped PbS (NPs) samples are investigated for normal light and laser attenuations. The mass attenuation coefficient increases, gradually, with increment of PbS (NPs), but the half value layer (HVL) parameter decreases with increasing of the doping ratio. These experimental results confirm the applicability of the fabricated samples to attenuate Red‐632 nm and Green‐532 nm laser radiation. It is possible to utilize PVA/PVP doped PbS (NPs) nanocomposites in different, wide‐scale optical filters.

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α

, can be evaluated by correlate the intensity of the incident probe wave from the fabricated polymeric sheets, I, to that of the transmitted beam (I o ) 32 :

\log (\frac{true}{I}) = - αd,

α = 2.303 . \frac{Abs (λ)}{d (italiccm)},

{((), αhυ)}^{2}

and

{((), αhυ)}^{0.5}

to estimate direct or indirect transition, respectively.…”

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Fabrication, microstructure, and nonlinear/linear optical parameters of polymeric‐based poly(vinyl alcohol)/poly(vinyl pyrrolidone) nanocomposites films for optical attenuation applications

Nawar

Ali

Khairy

et al. 2022

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…The optical absorption coefficient ( α ) plays an important role in obtaining the information about the structure of bands and the transition of electrons from the ground state to the higher energy states. [ 39 ] The value of “ α ” was calculated by using the transmittance data as

α = \frac{2.303 \log (1 / T)}{d}

where T is the transmittance and d is the thickness of the given crystal. By UV–vis spectra the direct bandgap of doped and undoped LSMH crystals was calculated.…”

Section: Resultsmentioning

confidence: 99%

“…The optical absorption coefficient ( ) plays an important role in obtaining the information about the structure of bands and the transition of electrons from the ground state to the higher energy states. [39] The value of " " was calculated by using the transmittance data as…”

Section: Dielectric Analysismentioning

confidence: 99%

Growth and Various Characterizations of Lithium Sulfate Monohydrate Single Crystals after Eu³⁺ and Tb³⁺ Ion Doping

Najar

Naik

Farooq

et al. 2020

Crystal Research and Technology

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A slow evaporation solution growth technique is used to grow rare earth (Eu3+ and Tb3+) doped lithium sulfate monohydrate (LSMH) single crystals. X‐ray diffraction analysis of these crystals confirms the monoclinic crystal structure with P21 space group. Energy dispersive X‐ray spectroscopy is used to check the incorporation of dopants into the crystal lattice of these LSMH crystals. Dielectric, UV–vis photoluminescence spectroscopy studies are carried out to study the electrical and optical behavior of these crystals. The optical bandgap decreases by doping and the current material follows the direct allowed transition. The dielectric constant and ac conductivity slightly increase with the incorporation of Eu3+ and Tb3+ ions in the crystal matrix. The effect of doping on the functional groups of LSMH crystals is confirmed by Fourier transform infrared spectroscopy. The micro‐Raman spectroscopic technique is carried out on these samples, confirming the stress experienced by the crystal with dopants, and further leading to the degradation of the crystal structure. The photoluminescence emission with a large decay time of the as‐grown crystals is dominated by the 5D0 → 7Fj transitions of Eu3+ and 5D4 → 7Fj transitions of Tb3+ ions, and further provides a possibility of using them as potential optical materials.

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Determination of some optoelectrical and thermodynamic parameters of β-lithium ammonium sulphate crystals

et al. 2020

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Optical reflectance, optical refractive index and optical conductivity measurements of nonlinear optics for l-aspartic acid nickel chloride single crystal

Cited by 18 publications

References 20 publications

Fabrication, microstructure, and nonlinear/linear optical parameters of polymeric‐based poly(vinyl alcohol)/poly(vinyl pyrrolidone) nanocomposites films for optical attenuation applications

Fabrication, microstructure, and nonlinear/linear optical parameters of polymeric‐based poly(vinyl alcohol)/poly(vinyl pyrrolidone) nanocomposites films for optical attenuation applications

Growth and Various Characterizations of Lithium Sulfate Monohydrate Single Crystals after Eu³⁺ and Tb³⁺ Ion Doping

Determination of some optoelectrical and thermodynamic parameters of β-lithium ammonium sulphate crystals

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Optical reflectance, optical refractive index and optical conductivity measurements of nonlinear optics for l-aspartic acid nickel chloride single crystal

Cited by 18 publications

References 20 publications

Fabrication, microstructure, and nonlinear/linear optical parameters of polymeric‐based poly(vinyl alcohol)/poly(vinyl pyrrolidone) nanocomposites films for optical attenuation applications

Fabrication, microstructure, and nonlinear/linear optical parameters of polymeric‐based poly(vinyl alcohol)/poly(vinyl pyrrolidone) nanocomposites films for optical attenuation applications

Growth and Various Characterizations of Lithium Sulfate Monohydrate Single Crystals after Eu3+ and Tb3+ Ion Doping

Determination of some optoelectrical and thermodynamic parameters of β-lithium ammonium sulphate crystals

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Product

Resources

About

Growth and Various Characterizations of Lithium Sulfate Monohydrate Single Crystals after Eu³⁺ and Tb³⁺ Ion Doping