Linear Optical Characteristics Research Articles

Investigating electronic, linear and nonlinear optical characteristics of Cr-Substituted ZnS materials

The electronic, linear, and nonlinear optical (NLO) characteristics of the Cr-substituted ZnS (ZnCrS) materials are reported within density functional theory (DFT) by using the mBJ potential. The results showed a cubic symmetry with a lattice constant decreasing as the Cr concentration increased, but the bulk modulus showed the opposite tendency. ZnS is a direct wide bandgap semiconductor; however, incorporating 75 % Cr in the ZnCrS materials causes a change in electronic bandgap nature. This change occurs due to Cr-induced defects and structural modifications, leading to new electronic transitions yielding novel optical features. The electronic and optical bandgap energy decreases with Cr content, depicting CrS as a semi-metallic material with significant light absorbance in the near-infrared and visible wavelengths accompanying the enhancement of the NLO response. It is noticed that a decrease in Εopt significantly impacted the NLO response, resulting in a significant change in the value of third-order susceptibility (χ(3)) from 5.862 × 10−11 to 2.074 × 10−9 esu. The NLO refractive index (n2) also follows the same changing trend, varying from 5.113 × 10−11 to 1.735 × 10−8 esu. This Cr-induced nonlinearity depicts strong polarizability and these materials can be significantly employed in near-infrared activated nanophotonic, photovoltaic, and optoelectronic devices.

Influence of d-d transition electrons and thickness variations on the excited-state optical properties: Nonlinear optical characterization of Cr2O3 thin film

The structural, morphological, linear, and nonlinear optical properties of Cr2O3 thin films with different thicknesses deposited by the thermal deposition, were measured. The structural and morphological parameters of films, determined by XRD, FESEM, and AFM images, are compared to the linear and nonlinear optical characteristics of these media. The bandgap of prepared thin films was obtained from DRS spectra. The electron effective mass (me∗/m0), linear refractive index (n0), optical static, and high frequency dielectric constant (ε0 , ε∞) values were calculated by using the band gap energy values. Increasing the thicknesses of thin films causes to decrease the band gap, an increase RMS, increase the size of nanoparticles and the nonlinear responses of thin films. The high magnitude of n2, and β belonged to the Cr2O3 (300 nm-thickness) in the order of 10−5 cm2/W, and 10−1 cm/W respectively. The fluctuations in nonlinear responses observed at different thicknesses are attributed to d-d transitions and intraband scattering of equilibrium electrons influenced by laser radiation, as indicated by the nonlinearity data. The considerably elevated refractive non-linearity values in the analyzed film materials suggest their potential for practical applications in optoelectronic devices.

Investigation of Nonlinear Optical Properties of NiO Nanoparticles using the Z-Scan Technique

In this research, linear and nonlinear optical properties of NiO nanoparticles (NPs) dissolved in ethanol were investigated. Linear optical characteristics of NiO NPs were studied using a UV-Vis spectrophotometer. The linear absorption coefficient (α0) was 0.88 and 0.57 cm-1 at 405 and 532 nm wavelengths, respectively. The band gap energy rose from 3.56 eV for a sample with a 10-7 g/ml concentration to 3.92 eV for the 10-3 g/ml concentration sample. Using the Z-scan technique, the nonlinear optical characteristics of the NPs were investigated. Two continuous wave laser diodes with 405 and 532 nm wavelengths and different powers were used. The Z-scan system with a closed aperture revealed that NiO NPs have a negative n2 (self-defocusing effect) at various laser powers. n2 increases as the power of the laser increases. The value of n2 was found to be 0.51×10-4 cm2/mW at a wavelength of 405 nm and a power of 0.33 mW. It improved as the laser power increased, reaching a maximum of 0.64×10-4 cm2/mW at a laser power of 1.51 mW. For the laser with a wavelength of 532 nm, the n2 value was 0.27×10-4 cm2/mW for a laser power of 1.01 mW. This value increased to 0.76×10-4 cm2/mW when the laser power increased to 6.2 mW. As measured by the Z-scan system with an open aperture, NiO NPs have a nonlinear absorption coefficient and display a two-photon absorption behavior.

The influence of the incorporation of Mn atoms in CdO nanoparticles on structural pathways, linear, and non-linear optical characteristics for optoelectronic devices

The influence of the incorporation of Mn atoms in CdO nanoparticles on structural pathways, linear, and non-linear optical characteristics for optoelectronic devices

Material synthesis, crystal structure, Hirshfeld surface and physicochemical characteristics Novel Stilbazolium crystal of 4-(2-(3-ethoxy-4-hydroxy-phenyl)-vinyl)-1-methyl pyridinium iodide (MEMPI) single crystal for NLO activity

In this study, a novel cation donor group 3-ethoxy-4-hydroxy benzaldehyde has been incorporated in the Stilbazolium cation with iodide anion to generate a new NLO activity of a single crystal of 4-(2-(3-ethoxy-4-hydroxy-phenyl)-vinyl)-1-methyl pyridinium iodide (MEMPI). The MEMPI crystal was effectively formed via the solvent evaporation technique. The structure and hydrogen bond interactions found in the molecule were determined by employing single-crystal X-ray diffraction. The compound crystallizes in the space group P21/c and monoclinic crystal pattern. The crystal structures are stabilized via intramolecular, intermolecular hydrogen bond interactions, C‒H···π, cation‒π, anion‒π, π···π stacking and lone pair-π interaction. In addition, a variety of O‒H···O, O‒H···I and C‒H···O interactions are also responsible for crystal packing. The 3D Hirshfeld surface and 2D fingerprint plots were used to examine the nature of intermolecular interaction. The 2D fingerprint maps indicate that the interactions between H···H contribute to 48.9 % of the total crystal stability. The newly synthesized material was characterized by 1H NMR and 13C NMR. In addition, the vibrational study of the synthesized molecule was performed using FTIR analysis. The grown crystal in linear optical characteristics were examined via a UV–Visible-NIR study. The photoluminescence (PL) activity of a MEMPI was studied with respect to the visible area and green colour emission was observed at 536 nm. The estimated CIE coordinates on the RGB colour gamut show the MEMPI crystal's ability to emit green light. The chemical etching approach was used to analyse the etch pit density and the growth habitat of the MEMPI crystal. The closed and open aperture Z-scan tests were carried out to determine the nature of third-order NLO susceptibility of the MEMPI crystal.

Recent advances in the structural, morphological, linear, and non-linear optical characteristics of SnO2 thin films deposited by SPT

Recent advances in the structural, morphological, linear, and non-linear optical characteristics of SnO2 thin films deposited by SPT

Exploring the effect of thin film thicknesses on linear and nonlinear optical properties of MoO3 thin film

The structural, morphological, linear, and nonlinear optical properties of MoO3 thin films deposited by thermal deposition were measured. The effect of various thicknesses of films was studied. The structural and morphological parameters of films, determined by x-ray diffraction, field emission scanning electron microscopy, and AFM images, are compared to the linear and nonlinear optical characteristics of these media. The bandgap of the prepared thin films was obtained from the diffuse reflectance spectroscopy spectra. The electron’s effective mass (me*/m0), linear refractive index (n0), and optical static and high frequency dielectric constant (ɛ0, ɛ∞) values were calculated by using the bandgap energy values. Increasing the thicknesses of thin films decreased the bandgap, increased the root mean square, and increased the size of nanoparticles and the nonlinear response of thin films. The high magnitude of n2 and β was because of MoO3 (300 nm-thickness), which were of the order of 10−5 cm2/W and 10−1 cm/W, respectively. The fluctuations in nonlinear responses observed at different thicknesses are attributed to d–d transitions and intraband scattering of equilibrium electrons influenced by laser radiation, as indicated by the nonlinearity data. The considerably elevated refractive nonlinearity values in the analyzed film materials suggest their potential for practical application in optoelectronic devices.

Structural, linear/nonlinear optical characteristics and radiation shielding effectiveness of Cu4O3/Cu2O dual-phase thin films: Influence of oxygen flow rate in reactive sputtering process

In the present work, we investigated the impact of oxygen flow rate on the structural, linear, and nonlinear optical characteristics while also evaluating the radiation shielding effectiveness during reactive radio frequency (rf) sputtering in the deposition of Cu4O3/Cu2O dual-phase thin films. Microstructural analysis revealed distinct changes with increased OFRs, switching from a Cu2O cubic structure phase to a Cu4O3 tetragonal structure phase. The XRD patterns revealed good crystallinity, and the crystallite size of the film reduced from 28 nm to 22 nm, and the microstrain exhibited an opposing trend as the oxygen flow rate increased. In contrast, investigating the optical properties of dual-phase Cu4O3 and Cu2O thin films using UV–Vis–NIR spectroscopy revealed intriguing trends in the absorbance spectra, absorption coefficient, and extension index. The apparent bandgap increases from 2.0 eV to 2.62 eV with increasing oxygen flow rates. In addition, nonlinear optical parameters, including the nonlinear refractive index n2 linear, nonlinear sensitivity (χ1 and χ3), and nonlinear absorption coefficient βc were calculated to demonstrate the applicability of these materials. The dual-phase structure of the films enhances their potential for effective radiation shielding. Our findings provide valuable insights into the design of properties of Cu4O3/Cu2O dual-phase thin films for applications ranging from photoelectric and nonlinear optical devices to radiation shielding effectiveness.

Enhanced Femtosecond Nonlinear Optical Susceptibility and Terahertz Conductivity in MoSe2‐Noble Metal Nanocomposites

AbstractCreating heterojunctions or composites by incorporating noble metals offers a remarkable means to modulate the electronic charge transfer and the nonlinear optical (NLO) properties in 2D transition metal dichalcogenides (TMDCs). The response of such 2D‐TMDC‐noble metal composites to femtosecond (fs) infrared (IR) and terahertz (THz) radiation, however, remains vastly unexplored. While the linear optical characteristics of a prototypical 2D‐TMDC, namely, MoSe2 nanosheets incorporated with noble metal (such as Au, Pt, and Ag) nanoparticles in the UV–Vis and the THz spectral range, the NLO characteristics are measured using a 70‐fs pulse at 800 nm excitation is investigated. The results demonstrate a clear reduction of band gap with the incorporation of noble metals in MoSe2, indicating an effective charge transfer mechanism at play. Notably, the MoSe2‐noble metal nanocomposites depicted a significant enhancement in the THz conductivities. In addition, a dramatic 4‐fold enhancement in the third‐order nonlinear coefficient and ≈2‐fold enhancement in the third‐order NLO susceptibility is achieved in MoSe2‐Ag nanocomposite. These results univocally suggest that the noble metal‐based composites with suitable charge transfer channels promote enhanced carrier mobilities and tunable electron transfer dynamics, making these hybrid materials promising candidates for optoelectronic applications both at IR and THz frequencies.

Hydrostatic pressure and temperature effects on nonlinear optical properties in harmonic-Gaussian asymmetric double quantum wells

The paper examines the linear and non-linear optical characteristics of an electron in harmonic Gaussian asymmetrical double quantum wells, taking into account thermodynamic variables such as temperature and hydrostatic pressure. Numerical calculations by considering the effective mass and parabolic band approximation are performed. The electron contained within an asymmetric double well generated by the sum of a parabolic and Gaussian potential has its eigenvalues and eigenfunctions determined using the diagonalization approach. For nonlinear optical coefficients, the density matrix expansion is used. Wavefunctions and energy levels vary as an effect of the applied fields. In harmonic Gaussian asymmetrical double quantum wells, the total optical absorption coefficient (TOAC), the relative refractive index changes (RRIC), and second harmonic generation (SHG) have all been theoretically investigated. The magnitude and position of the resonant peaks are significantly influenced by the hydrostatic pressure and temperature effects. With controllable coupling and externally applied hydrostatic pressure and temperature, the potential model presented in this study can be used to simulate and manipulate the optical and electronic properties of the asymmetric double-quantum heterostructures, such as double quantum dots and wells.

Optical and Dielectric Characteristics of Poly (Methyl Methacrylate)/Polyethylene Oxide/Carbon Nanoparticle Composites Loaded with Nano NiFe2O4

The current study proposes a simple, low-cost, and functional method of doping a pure matrix of poly (methyl methacrylate)/polyethylene oxide/carbon nanoparticles (PMMA/PEO/CNPs) with nano nickel ferrite (NiFe2O4) as a filler. To create NiFe2O4 nanoparticles, a straightforward chemical growth, sol-gel auto-combustion system was used. Next, environmentally friendly and cost-effective, undoped and blended polymers doped with NiFe2O4 using a solution-casting method were synthesized. Rietveld refinement analysis was used to investigate the structure and microstructure of the NiFe2O4. Transmittance electron microscopy was used to confirm the nano nature of the filler. X-ray diffraction was used to verify the crystallite nature of the undoped and doped PMMA/PEO/CNPs blends with NiFe2O4. The linear optical characteristics of the proposed blends were obtained using a diffuse reflectance spectrophotometer. The measured optical parameters included transmittance, absorbance, reflectance, direct and indirect optical bandgaps, absorption coefficient, linear refractive index, extinction coefficient, dielectric constant, energy loss functions, in addition to optical and electrical conductivities. Also, nonlinear optical constants for the synthesized blends, such as the linear and third nonlinear susceptibilities, nonlinear refraction coefficient and nonlinear absorption coefficient, were calculated. The direct and indirect optical band gap energies of the PMMA/PEO/CNPs blends were 4.97 and 4.8 eV, respectively. As the NiFe2O4 doping level increased in the blend to 2.5 wt%, the optical band gap energy values decreased to 4.54 and 4.64 eV, respectively. The fluorescence spectra of the undoped and doped PMMA/PEO/CNPs blended polymers with nano NiFe2O4 were also explored. The effect of NiFe2O4 doping amount on the energy density, electric dielectric constant, ac conductivity and electric moduli of the host blend was also studied. In conclusion, the considered NiFe2O4-doped PMMA/PEO/CNPs blends have an effective and promising role in optoelectronic applications.

Exploring nonlinear and linear optical properties of N, N’-bis(salicylidene)-o-phenylenediamine (salophen) through Z-scan technique and TD-DFT computational analysis

This investigation delves into the comprehensive analysis of the linear and nonlinear optical characteristics exhibited by N, N’-bis(salicylidene)-o-phenylenediamine (salophen) using a combination of Z-scan methodology and quantum chemistry calculations. The Z-scan technique facilitated meticulous computations of the third-order susceptibility, nonlinear absorption coefficient, and nonlinear refractive index of the specimen. Specifically, in the solvent DMSO, the assessed values for the nonlinear refractive index, nonlinear absorption coefficient, and third-order susceptibility were determined to be 0.035 × 10–10 cm2 W −1 , −0.024 × 10–5 cm W −1 , and 0.596 × 10–5 esu, respectively. Furthermore, quantum mechanical analyses were employed to meticulously calculate the molecular hyperpolarizabilities (β and γ), dipole moment (μ), and dipole polarizability (α) of salophen. This thorough exploration highlighted a notable congruence between the outcomes derived from experimental observations and those obtained through quantum mechanical simulations. The collective findings from both theoretical computations and experimental assessments distinctly showcase the robust nonlinear potential inherent in salophen. These insights suggest its promising suitability and potential as a viable candidate for applications in optical devices. The alignment between theoretical predictions and experimental results underlines the reliability and potential practicality of salophen in the realm of optical technology, emphasizing its significance as a potential material for advancing optical device functionalities.

The effect investigates of temperature on the optical and electrical properties of sprayed SnS: experimental and theoretical study

In this study, Tin monosulfide SnS semiconductor absorbers was deposited by chemical spray pyrolysis route on the glass substrate. We examined the impact of substrate temperature on the structural, morphological, linear optical and electrical characteristics of SnS absorber at many substrate temperatures such as 50 °C, 375 °C and 400 °C. The SnS films have been analysed by diverse techniques like X-ray diffraction, Raman spectroscopy, Scanning electron microscopy and UV-Vis spectrophotometer. The X-ray diffraction (XRD) spectra revealed that the SnS crystallize in the orthorhombic crystal system with the apparition of the preferential crystallographic direction oriented along (111) planes. The SEM micrographs indicate a great uniformity and granular morphological surface of SnS films. Linear optical constants such as energy gap (Eg), coefficient of extinction (k), index of refraction (n), optical conductivity (σopt), as well as the electrical properties confirm the suitable application of SnS thin films as absorber layer in the optoelectronic device applications. Additionally, we have applied the density functional theory DFT and GGA generalized gradient approximation to study the electronic characteristics; as a result of the electronic band structure the SnS absorber has a suitable energy gap.

Insights into the linear and non-linear optical characteristics of substituted bi-naphthyl-2-pyrazolines

Donor/acceptor substituants in binaphthyl-2-pyrazolines significantly alter their optical properties. DFT calculations confirm that the arrangement of the electron-releasing units is key to modulating 2d- and 3rd-order susceptibilities in PMMA films.

The influence of temperature on structural and third order nonlinear properties of cadmium sulfide nanoparticle films prepared by chemical reaction method

In this work Cadmium sulfide nanoparticles)CdS-NPs(was deposited on glass substrates using a polymerassisted chemical reaction method (CRM) and annealed at different temperatures, 300∘C, 400∘Cand 500∘C. The structural and optical characteristics of CdS-NPs films were investigated using X-ray diffraction (XRD), FTIR analysis, UV–Vis absorption spectroscopy and scanning electron microscopy (SEM). X-ray diffraction (XRD) and selected area electron diffraction studies confirmed the formation of nanocrystalline cubic phase of CdS in the films. The calculation shows that the CdS crystallized in cubic phase and formed NPs with average crystallite sizes of 17.2, 20.1 and 23.3 nm and the microstrain is about 0.034, 0.030 and 0.026 for CdS films annealed at 300∘C, 400∘C and 500∘C. The UV–Vis spectrophotometer measurements showed that the films were highly transparent value of 97 % at annealing temperature of 300∘Cand 400∘C. The direct allowed bandgaps have been determined and they lie in the range 2.49 -205 eV for CdS-NPs film annealed at temperatures of 300 ∘C–500∘C. The thermal non-linear refractive indices (n2) of the CdS-NPs are determined using open and closed aperture Z-scan techniques. The optical limiting (OL) behaviours have been studied. It was shown that the OL efficiency depended on the CdS-NPs temperature. Under laser irradiation, self-diffraction rings were seen in CdS-NPs-300∘C, CdS-NPs-400∘C and CdS-NPs-500∘C. With increased input power, each pattern is created by a rise in the number of rings and the diameter of the outermost ring. The aim of the current project studies is to investigate the linear and nonlinear optical characteristics to find fresh applications for CdS-NPs in the world of optical modulators.

The Linear Optical Properties of Rhodamin110 Organic Dye Doped with Metal Nanoparticles

Background:
 Laser dyes are unsaturated hydrocarbon compounds that have the advantage of having double or triple bonds coupled with carbon atom chains. This system benefits from light absorption in the visible range (200–700 nm) and the transmission spectrum of absorption in the visible range
 Materials and Methods:
 This research has focused on the effect of Adding ethanol solution to rhodamine110 dye with different concentrations, the linear properties (permeability, absorbance) of Rhodamine110 dye were studied as it was dissolved in ethanol to prepare solutions with concentrations (0. 01, 0.03, 0.05) and at room temperature
 Results:
 The absorbance A of Rhodamine110 dye with ethanol was calculated for the above concentrations, respectively, as well as and the transmittance T was calculated for the above concentrations, respectively, to obtain curves and rhodamine110 dyes were mixed with nanomaterials to improve the properties of the dyes
 Conclusion:
 In this study, According to Beer-Lambert's rule, increasing the dye concentration will increase absorbance, which will raise the linear optical coefficients (refractive index and coefficient of absorption) for all produced samples. The probability of electronic transitions will definitely be affected by the type of solvent., and this has an impact on linear optical characteristics, particularly the positions and width of the absorption spectra. And the addition of nanomaterials added better improvements to the dye. The results showed that the highest linear properties appeared when the silver nanomaterials with rhodamine110 dye

A study on novel semi-organic material L-phenylalanine mixed with cadmium nitrate single crystals

Slow evaporation solutions turned out to be a good way to get single crystals of semi-organic NLO from an aqueous solution. During this experiment, the ambient temperature was used. Through X-ray diffraction analysis, a single crystal of L-phenylalanine (C9H11NO2) cadmium nitrate (Cd (NO3)2)was characterised. As a result of this construction, the P21 space group has the following cell parameters: a = 12.47 Å, b = 5.43 Å, c = 15.00 Å, α = γ = 90°, β = 107.61°. It was found that a 257 nm cut-off wavelength was found from UV–Vis-NIR spectroscopy. Aside from linear optical characteristics such as the extinction coefficient (K) and reflectance (R), this study examined a number of geometrical features. In addition, the crystal was shown to have a high level of optical transparency. Fluorescence (FL) spectrum analysis has been used in the process of investigating how the luminescence of LPCN behaves. Evidence that functional groups are present may be gleaned from the FT-IR vibrational patterns seen in the LPCN. We used a Vickers microhardness hardness tester to figure out the brittleness index (Bi), as well as the hardness (Hv), Meyer's index (n), yield strength (σy), fracture toughness (Kc), and elastic stiffness constant (C11). The evaluation of the produced crystals' dielectric properties was accomplished by adjusting the frequency. In contrast to KDP and other organic materials, the threshold value for laser-induced damage was found to be much higher. The crystal's surface morphology was analysed using SEM to get a better idea of what it looked like. EDAX analysis of the LPCN crystal was conducted to determine what elements are present in it. The non-linear optical quality of the compound that was discovered with Kurtz powder's second harmonic production in the case of Nd: YAG laser light shows that it is a potential candidate for frequency conversion. The nonlinearity coefficient (β) was measured using the open aperture Z-scan technique (Nd: YAG, 532 nm, 9 ns), and the results showed that it was 0.36 × 10–11m/W. This coefficient is the consequence of a phenomenon known as effective genuine two-photon absorption. The crystal that was created now has a fluency threshold of 3.52 × 1012 W/m2, which makes it a possible candidate for use in optical limiting devices because of its consequent optical limiting behaviour.

First-principles study of the optoelectronic and thermoelectric properties of lead-free ASnI3 (A = K, Rb, and Cs) novel halide perovskites

In this work, we investigated the optoelectronic and thermoelectric properties of novel lead-free ASnI3 (A = K, Rb, and Cs) perovskite materials employing density functional theory calculations with the most accurate modified TB-mBJ potential. The three studied materials are similar in terms of their computed band profiles. The presence of an energy bandgap between the valence and conduction bands confirms the materials to be semiconductors with an indirect band-type nature. The CsSnI3 with a small gap value compared to the other two materials follows that it would require less energy for excitation. The calculated density of states and their actual electronic orbital contributions are also examined. The projected total density of states shows a successive variation along the energy value. Moreover, the linear optical characteristics are computed and investigated for their possible use in optoelectronic devices. The polarizability of KSnI3 is higher than the other two materials. The studied materials can be potential as an anti-reflecting coating material against UV rays as confirmed by the sharp peaks in the reflectivity spectra. The positive value of RH was consistent with the p-type nature of these materials as also revealed by the Seebeck coefficient and electronic characteristics. The materials seem to be prospective for use in thermoelectric devices supported by the predicted thermoelectric parameters.

Extraction of Natural Pigment Curcumin from Curcuma Longa: Spectral, DFT, Third-order Nonlinear Optical and Optical Limiting Study.

Herein, we report the extraction of natural pigment curcumin from curcuma longa and their linear and third-order nonlinear optical (NLO) characteristics. The characterization techniques viz., UV-Visible absorption, FT-IR, Micro Raman and Gas Chromatography Mass Spectrum (GC-MS) are used to study the spectral characteristics of curcumin.Third-order NLO features of curcumin are studied using Z‒scan technique with a semiconductor diode laser working at 405nm wavelength. The natural pigment exhibits negative nonlinear index of refraction resulting from self-defocusing and positive coefficient of absorption is the consequence of reverse saturable absorption (RSA). The order of nonlinear index of refraction (n2) and nonlinear coefficient of absorption (β) is measured to be 10-7 cm2/W and 10-2cm/W, respectively. Third-order NLO susceptibility (χ(3)) and second-order hyperpolarizability (γ) of curcumin is measured to be 2.73 × 10‒7 esu and 1.67 × 10‒31 esu, respectively. A low optical limiting (OL) threshold of 0.71 mW is observed in the extracted pigment. The experimental results are supplemented by quantum mechanical calculations of the NLO parameters. The overall result finding is that curcumin extracted from curcuma longa has the potential to be novel optical candidates for photonics and optoelectronics applications.

Effect of Laser Radiation on the Linear and Nonlinear Optical Characteristics of Polyvinyl Alcohol/Carboxymethyl Cellulose/Nickel Oxide Nanocomposite Films

A nanocomposite (NC) of polyvinyl alcohol (PVA), carboxymethyl cellulose (CMC), and nickel oxide (NiO) nanoparticles (NP) was prepared using sol–gel and ex-situ casting techniques. The results indicated that the NiO had a single phase with the space group (R-3m). Its average grain size was 18 nm. We used an infrared pulsed laser to irradiate the PVA/CMC/NiO NC samples with energy fluences ranging from 4 to 16 Joule/cm2. The induced changes in the linear and nonlinear optical properties of the NC samples due to the laser irradiation were investigated by means of UV spectroscopy. When the laser fluence increased up to 16 Joule/cm2, the maximum fluence used, both the direct and indirect bandgaps decreased. Additionally, we used the optical dielectric loss (ε″) to detect the type of microelectronic transition for the PVA/CMC/NiO NC samples, which was found to be a direct allowed transition. The laser effects on the absorbance, extinction coefficient, refractive index, dielectric parameters, optical conductivity, and the nonlinear parameters of the NC were studied. The enhancement in the optical properties indicated that the laser radiation is a useful tool that allows the application of the resulting PVA/CMC/NiO NC in optoelectronic devices.