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Artykuły w czasopismach na temat „CW Z-scan”

Autor: Grafiati

Data publikacji: 3 czerwca 2025

Data aktualizacji: 31 lipca 2025

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1

Johan, Sebastián-Díaz Tovar, Valbuena-Duarte Sonia, and Racedo-Niebles Francisco. "Study of non-linear optical properties in automobile lubricating oil via Z-Scan technique." Revista Facultad de Ingeniería -redin-, no. 86 (March 27, 2018): 27–31. https://doi.org/10.17533/udea.redin.n86a04.

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Non-linear optical properties were obtained as a function of laser power for the 20W-50 multi-grade oil for engines. These properties were obtained by using the Z-scan technique for transmission in closed and open cell configurations. A Nd:YAG laser operating in continuous wave (CW) was used, emitting in 532 nm and regulated in electric current. To control the technique, an interface in LabVIEW was implemented, which allows monitoring real-time during the measurement process. The values of the non-linear absorption coefficient (β), non-linear refractive index (<em><sub>n2</sub></em>), and

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2

Sarkhosh, Leila, and Nastaran Mansour. "Analysis of Z-scan measurement for large thermal nonlinear refraction in gold nanoparticle colloid." Journal of Nonlinear Optical Physics & Materials 24, no. 02 (2015): 1550014. http://dx.doi.org/10.1142/s0218863515500149.

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In this work, based on nonlocal heat effect and Fresnel diffraction theory, the characteristics of closed Z-scan in materials with a large nonlinear phase shift have been studied and a formula for Z-scan transmittance is derived. Numerical computations show that the shapes of Z-scan curves are greatly affected by the values of thermal nonlinear phase shift. The Z-scan behavior is compared to the conventional thermal Z-scan theories, including the thermal thin lens and aberrant thermal lens model. We have used the Z-scan models to determine the nonlinear refraction of gold nanoparticle (AuNP) d

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3

Zanuto, V. S., J. F. M. dos Santos, M. L. Baesso, and T. Catunda. "Single-beam time-resolved cw thermal Z-scan analysis applied in solids." Optics & Laser Technology 142 (October 2021): 107248. http://dx.doi.org/10.1016/j.optlastec.2021.107248.

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Ba, Oumar, Mihaela Chis, Christophe Cassagne, and Georges Boudebs. "Phase shift imaging in thin films using CW Z-scan based technique." Physica B: Condensed Matter 603 (February 2021): 412608. http://dx.doi.org/10.1016/j.physb.2020.412608.

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Journal, Baghdad Science. "Study of Nonlinear Refraction and Nonlinear Absorption Coefficients of Different CdS Film Thickness by diode laser." Baghdad Science Journal 10, no. 1 (2013): 217–25. http://dx.doi.org/10.21123/bsj.10.1.217-225.

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In the present work, different thicknesses of CdS film were prepared by chemical bath deposition. Z-Scan technique was used to study the nonlinear refractive index and nonlinear absorption coefficients. Linear optical testing were done such as transmission test, and thickness of films were done by the interference fringes (Michelson interferometer). Z-scan experiment was performed at 650nm using CW diode laser and at 532nm wavelength. The results show the effect of self-focusing and defocusing that corresponds with nonlinear refraction n2. The effect of two-photon absorption was also studied,

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6

ZHANG, XIAOQIANG, CHANGSHUN WANG, YI ZENG, and JINWEN ZHANG. "NONLINEAR REFRACTION AND PHOTOINDUCED BIREFRINGENCE IN THE METHYL-RED-DOPED POLYMER THIN FILM." Journal of Nonlinear Optical Physics & Materials 19, no. 03 (2010): 437–44. http://dx.doi.org/10.1142/s0218863510005364.

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Single beam Z-scan measurement has shown that the methyl-red-doped PVA thin film possesses a large nonlinear refractive index: n2 ( cm 2/ W ) = -2.29 × 10-4 cm 2/ W and n2 ( cm 2/ W ) = -8.75 × 10-5 cm 2/ W for the CW 532 nm linear polarization light and circular polarization light, respectively. The mechanism for the process of nonlinear refraction is discussed in terms of the photoisomerization of MR molecules. Moreover, photoinduced birefringence with values on the order of 10-4 has been observed when investigating the photoinduced birefringence of the thin film with a CW 532 nm laser as th

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7

Tarek, S. A., S. B. Faruque, S. M. Sharafuddin, et al. "Linear and thermo-optically generated nonlinear optical response of bovine serum albumin and its constituent amino acids in continuous wave z-scan." AIP Advances 13, no. 3 (2023): 035315. http://dx.doi.org/10.1063/5.0135447.

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Proteins are large biomolecules in the form of polypeptide chains consisting of amino acid (AA) residues. Ultraviolet–visible absorption spectroscopy and continuous wave (CW) z-scan of bovine serum albumin (BSA) and some of its constituent AAs were examined to deduce the relationship between the optical properties of this protein molecule and its constituents. From the analysis of their optical spectra, the absorption at 278 nm by BSA is found to be the outcome of the cumulative effects of the absorptions by constituent aromatic AA residues, cysteine disulfide bonds, and methionine. Similarly,

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8

Cassagne, Christophe, Oumar Ba, and Georges Boudebs. "Time-Resolved cw Thermal Z-scan for Nanoparticles Scattering Evaluation in Liquid Suspension." Materials 15, no. 14 (2022): 5008. http://dx.doi.org/10.3390/ma15145008.

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The thermal lens effect is analyzed as a time-resolved Z-scan measurement using cw-single Gaussian beam configuration. The main characteristics of the measurement method are determined. We focus on the evaluation of the measurement error from statistical calculations to also check the linearity of the response and the way to extract the thermo-optical characteristics of absorbing liquids. The results are also applied to demonstrate the feasibility of absorption and scattering efficiencies determination on gold nanoparticles of 5 and 50 nm diameters.

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9

Martínez Irivas, Beatriz Adriana, Emma Vianey García Ramírez, Doralycia Carranza Zuñiga, Athziri Zúniga Méndez, and Raúl Ochoa Valiente. "Medición de parámetros característicos de un láser continúo CW." Ciencia Latina Revista Científica Multidisciplinar 9, no. 1 (2025): 3510–22. https://doi.org/10.37811/cl_rcm.v9i1.16097.

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Actualmente, el láser (pulsado o continuo) es usado en diferentes investigaciones desde la explicación en ciencia básica hasta su uso en ciencia de frontera en nuevas tecnologías. Por esta razón se requiere caracterizarlos para conocer sus parámetros y sus especificaciones aplicando diferentes técnicas de caracterización del haz láser. En este trabajo se presentan resultados experimentales de parámetros característicos, de un haz Gaussiano de un haz láser continuo de iones de Argón de longitud de onda 514 nm, tales como: ancho del haz W(z), cintura del haz W0 y la distancia de Rayleigh z0, est

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10

Aithal, Shubrajyotsna, P. S. Aithal, and G. K. Bhat. "CW Optical Limiting Study in Disperse Yellow Dye-doped PMMA-MA Polymer Films." IRA-International Journal of Applied Sciences (ISSN 2455-4499) 5, no. 3 (2016): 129. http://dx.doi.org/10.21013/jas.v5.n3.p4.

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<div><p><em>Molecules with high two-photon absorption (TPA) cross section and the molecules which have reverse saturation absorption (RSA) cross section are of great interest today because of their application in three-dimensional optical data storage and photonic switches. During last forty years, several techniques have been developed to determine the two-photon absorption cross-sections and reverse saturation absorption cross-sections of the materials. This includes direct methods, such as nonlinear transmission and Z-scan methods and indirect methods, such as two-photon e

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11

HENARI, F. Z., S. CASSIDY, KHALIL E. JASIM, and A. A. DAKHEL. "NONLINEAR REFRACTIVE INDEX MEASUREMENTS OF CURCUMIN WITH CW LASER." Journal of Nonlinear Optical Physics & Materials 22, no. 02 (2013): 1350017. http://dx.doi.org/10.1142/s0218863513500173.

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We report on the measurements of the nonlinear reflective index coefficient for curcumin at three different wavelengths using a Z-scan technique. This material is found to be a new type of natural nonlinear media. It shows a large negative nonlinear refractive index of the order of 10–6 cm2/W. The origin of the nonlinearity was investigated by comparison of the formalism that is known as the Gaussian decomposition model with the thermal lens model. The nonlinear refractive index was found to vary with intensity and reveals that curcumin can be a promising material for optical limiting.

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12

Biswas, M. K., M. K. Amin, P. K. Das, et al. "Single beam Z-scan for the calculation of nonlinear refractive index (n2) for poly(2,5-dimethylaniline)." Journal of Nonlinear Optical Physics & Materials 24, no. 03 (2015): 1550039. http://dx.doi.org/10.1142/s0218863515500393.

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An experimental work has been done to measure the nonlinear refractive index of poly(2,5-dimethylaniline) (PDMA). In this work, a continuous wave (cw) Ar-ion laser has been used to calculate n2 for a novel polymer; poly(2,5-dimethylaniline): synthesized from 2,5 dimethylaniline. The single beam Z-scan technique was used with laser beams of 514 and 488 nm wavelengths, taking PDMA in methanol solvent at different concentrations. The order of n2 was found to be of the order of ~ 10-14 esu.

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13

Mostaghni, Fatemeh, and Yasaman Abed. "Synthesis and investigation of nonlinear optical properties of Para Red: Z-scan technique and quantum mechanical calculations." Materials Science-Poland 36, no. 3 (2018): 445–51. http://dx.doi.org/10.1515/msp-2018-0039.

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AbstractIn this study, we present a systematic study of linear and nonlinear optical properties of Para Red with the aim of Z-scan technique and quantum mechanical calculations. The Z-scan experiments were performed using a 532 nm Nd: YAG (SHG) CW laser beam. Para Red exhibited a strong nonlinear refractive index, nonlinear absorption coefficient and third-order nonlinear susceptibility 3.487 × 10−6 cm2/W, 2.341 × 10−1cm/W and 2.157 × 10−4 esu, respectively. Also, quantum chemical analysis was used for the calculation of the dipole moment μ, dipole polarizability α, anisotropy of polarizabilit

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14

Razvi, M. A. N., S. M. Afzal, Salman A. Khan та Ahmed H. Bakry. "An Efficient Ultrasonic-Assisted Synthesis and Nonlinear Optical Property of Donor (D) -π-Acceptor (A) Chalcone (DDFP)". Zeitschrift für Physikalische Chemie 234, № 1 (2020): 145–52. http://dx.doi.org/10.1515/zpch-2019-1371.

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Abstract3-(3,4-dimethoxyphenyl)-1-(2,5-dimethylfuran-3-yl)prop-2-en-1-one (DDFP), is prepared by the equimolar ratio of 1-(2,5-dimethylfuran)ethan-1-one and 3,4, dimethoxy benzaldehyde under ultrasonic irradiation. Structure of DDFP was established by the FT-IR, 1H and 13C-NMR spectroscopic methods and elemental analysis. The nonlinear optical properties of this dye using the z-scan technique with a cw argon ion laser at 514.5 nm are studied. Both the closed and open aperture z-scan data is used to estimate the nonlinear refractive index n2 and the nonlinear absorption coefficient β respective

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15

Nader, Rajaa, Slafa I. Ibrahim Ibrahim, and Ali H. Al-Hamdani. "Linear and Nonlinear Optical Properties of Anthocyanin Dye from Red Cabbage in Different pH Solutions." Baghdad Science Journal 20, no. 3(Suppl.) (2023): 1131. http://dx.doi.org/10.21123/bsj.2023.7461.

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This article studied some linear and nonlinear optical characteristics of different pH solutions from anthocyanin dye extract at 180 oC from red cabbage. First, the linear spectral characteristics, including absorption and transmittance in the range 400-800 nm for anthocyanin solution 5% v/v with different pHs, were achieved utilizing a UV/VIS spectrophotometer. The experimental results reveal a shift in the absorption toward the longer wavelength direction as pH values increment. Then, the nonlinear features were measured using the Z-scan technique with a CW 532 nm laser to measure the nonlin

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16

Zidan, M. D., A. W. Allaf, A. Allahham, and A. AL-Zier. "Z-scan measurements of single walled carbon nanotube doped acetylenedicarboxylic acid polymer under CW laser." Optics & Laser Technology 80 (June 2016): 72–76. http://dx.doi.org/10.1016/j.optlastec.2016.01.011.

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17

Granmayeh Rad, Adeleh, Khosro Madanipour, and Ata Koohian. "Ag Nanoparticles: Experimental Study of Sign Identification of Nonlinear Refractive Index by Moiré Deflectometry and Z-Scan Methods." ISRN Nanomaterials 2013 (October 21, 2013): 1–6. http://dx.doi.org/10.1155/2013/327575.

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Two different methods are presented for the sign identification of nonlinear refractive index () of Ag colloidal nanoparticles which are based on nonscanning Moiré deflectometry and Z-scan. In the Moiré deflectometry setup, two lasers are used, one is used as pump laser which causes thermal nonlinear effects in the sample, and the second one is used as the probe laser for monitoring these effects by Moiré deflectometry system. By observing the deflected Moiré fringes, we can determine the sign of nonlinear refractive index in real time, and there would be no need for calibration or complicated

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18

G., Ahila, Vinitha G., and Anbalagan G. "Insight into nonlinear third order susceptibility measurement and optical limiting nature of 8-hydoxyquinolinium hydrogen fumarate single crystal." Journal of Indian Chemical Society Vol. 96, Jan 2019 (2019): 45–47. https://doi.org/10.5281/zenodo.5652728.

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Department of Physics, Presidency College, Chennai-600 005, India Division of Physics, School of Advanced Sciences, Vellore Institute of Technology (VIT), Chennai-600 127, India Department of Nuclear Physics, University of Madras, Chennai-600 025, India <em>E-mail</em>: anbu24663@yahoo.co.in <em>Manuscript received online 01 September 2018, accepted 09 October 2018</em> The NLO third order characteristics for 8-hydroxyquinolinium hydrogen fumarate (8HQF) compound were estimated by a diode pumping second harmonic CW Nd:YAG laser (532 nm) by utilizing Z-scan method. The resultant value with its

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19

Kozich, V. P., A. Marcano, F. E. Hernandez, and J. A. Castillo. "Dual-Beam Time-Resolved Z-Scan in Liquids to Study Heating Due to Linear and Nonlinear Light Absorption." Applied Spectroscopy 48, no. 12 (1994): 1506–12. http://dx.doi.org/10.1366/0003702944027741.

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Dual-beam extension of a Z-scan technique has been developed to study the thermal changes in the refractive index resulting from linear and nonlinear absorption in liquids. The experiments were carried out with nanosecond-pulsed Nd:YAG radiation and its second harmonic as the excitation sources and a He-Ne laser as the probe beam. The cw probe radiation enabled us to observe temporal dynamics of the refractive index variations, to select the thermal signal for Z-scan measurement and to measure absolute changes in the refractive index as small as 10−6 due to heating in a number of organic liqui

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20

Nadjari, H., and Z. Abasi Azad. "Determining the nonlinear coefficient of gold and silver nano-colloids using SPM and CW Z-scan." Optics & Laser Technology 44, no. 5 (2012): 1629–32. http://dx.doi.org/10.1016/j.optlastec.2011.11.013.

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21

Guo, Yang Xue, Xiang Hong Kong, Wei Yang, and Jia Jin Zheng. "Study on All Optical Switching Effect of Excited State Proton Transfer Organic Molecule 3-Hydroxyflavone." Advanced Materials Research 482-484 (February 2012): 830–34. http://dx.doi.org/10.4028/www.scientific.net/amr.482-484.830.

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Abstract: We report the dependence of the all optical switching effect of 3-hydroxyflavone (3-HF) on the efficiency of excited state proton transfer (ESPT) using pump probe method. A cw probe laser beam of 632.8nm passing through the sample is switched off by a 35ps pulse pump laser beam of 355nm. We also measured the nonlinear refractive index of 3-HF in different solvents by using z-scan technique. The results show that the optical switching effect will be more obvious when the efficiency of excited state proton transfer is improved, while not proportional to the nonlinear refractive index o

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Shubrajyotsna, Aithal, S. Aithal P., and K. Bhat G. "TYPE 1 & TYPE 2 OPTICAL LIMITING STUDIES IN DISPERSE ORANGE-25 DYE-DOPED PMMA-MA POLYMER FILMS USING CW LASER." International Journal of Applied and Advanced Scientific Research 1, no. 1 (2016): 196–208. https://doi.org/10.5281/zenodo.208184.

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Materials with exceptional third order nonlinear optical properties are critical to the continuing development of photonics and electro-optical devices such as those used in optical communications, networking, optical computation for signal processing, and data storage devices. The nonlinear optical material research is generally focussed on improving the efficiency of optical wavelength conversion, optical amplification, nonlinear absorption, refractive index changes etc. which are input light intensity dependent. During last few years, the organic dye-doped polymer films are getting more att

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23

Abdallah, B., M. D. Zidan, and A. Allahham. "Deposition of ZnS films by RF magnetron sputtering: Structural and optical properties using Z-scan technique." International Journal of Modern Physics B 33, no. 29 (2019): 1950348. http://dx.doi.org/10.1142/s021797921950348x.

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Deposition of zinc sulfide (ZnS) thin films on Si (1 0 0) and glass substrates has been performed using RF magnetron sputtering method. Film structure has been analyzed by X-ray Diffraction (XRD), while the scanning electron microscope (SEM) images have been used to explore the film morphology. FTIR and Raman spectroscopies have been used to confirm the film composition. The stoichiometry has been verified by Energy dispersive X-ray spectroscopy (EDX) technique. The XRD patterns have indicated that the films possess a polycrystalline nanocrystallite cubic structure. The optical properties of t

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Jalil, Muhammad Arif Bin. "Optical Limiting Methods by Z-Scan Technique for Non-Linear Optical Absorption of PVC/TiO2 Nanocomposite." International Journal for Research in Applied Science and Engineering Technology 12, no. 9 (2024): 1355–59. http://dx.doi.org/10.22214/ijraset.2024.64343.

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To further our grasp of photonics technology, our work focuses on thin-film PVC/TiO2 nanocomposites. Nanocomposites composites were created by combining TiO2 nanoparticles with Polyvinyl Chloride (PVC) as the polymer matrix. The thin film was fabricated using the casting method. Spectral analysis was used to determine the absorbance parameters and compute the linear absorption coefficient. The nonlinear refractive index and nonlinear absorption coefficient were measured using a single beam Z-scan approach with a CW diode pumped solid state (DPSS) laser (Coherent Verdi-V5, 532 nm) acting as the

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Tarek, S. A., S. B. Faruque, S. M. Sharafuddin, et al. "Closed aperture CW Z-scan of L-tryptophan for determination of optical nonlinearity in the thermal regime." Journal of the Optical Society of America B 38, no. 10 (2021): 2806. http://dx.doi.org/10.1364/josab.432845.

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Zidan, M. D., M. B. Alsous, A. W. Allaf, A. Allahham, A. AL-Zier, and H. Rihawi. "Z-scan measurements of the third order optical nonlinearity of C60 doped poly(ethylacetylenecarboxylate) under CW regime." Optik 127, no. 5 (2016): 2566–69. http://dx.doi.org/10.1016/j.ijleo.2015.11.226.

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HUSSAIN, S. A., A. S. HADI, and F. A. NAJIM. "INVESTIGATING THE NONLINEAR OPTICAL PROPERTIES OF CuS THIN FILMS PREPARED BY CHEMICAL BATH DEPOSITION USING Z-SCAN TECHNIQUE." Chalcogenide Letters 17, no. 6 (2020): 315–20. http://dx.doi.org/10.15251/cl.2020.176.315.

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CuS thin films were participated onto glass substrate by using chemical Bath Deposition method at (75οC) for (1hr) with different concentrations (0.03,0.05 and 0.08)M of Thiourea (TU) and Copper Chloride with molar ratio (0.01 ) have been used for solution preparation. As deposition and annealed films were studied. Non-linear absorption coefficient is measured by using Z-Scan technology and it consists of two sections. The first section is closed opening were located before detector to calculate the non-linear refractive index. Whereas the second section, were aperture located before the detec

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MAJLES ARA, M. H., and Z. DEHGHANI. "MEASUREMENT OF NONLINEAR RESPONSES AND OPTICAL LIMITING BEHAVIOR OF TIO2/PS NANO-COMPOSITE BY SINGLE BEAM TECHNIQUE WITH DIFFERENT INCIDENT INTENSITIES." International Journal of Modern Physics: Conference Series 05 (January 2012): 277–83. http://dx.doi.org/10.1142/s2010194512002139.

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Titanium dioxide (titania) is a cheap, nontoxic and highly efficient photocatalyst being extensively applied for the degradation of organic pollutants, air purification, water splitting, reduction of nitrogen to ammonia, and optical devices due to its optical behaviors. The third-order nonlinear optical properties of TiO 2/ PS nano-composite were studied by means of single beam transmission technique, using a continuous-wave (CW) He - Ne laser beam with a wavelength of 632.8 nm with three different incident intensities. The magnitude and sign of the third-order nonlinear refractive index ( n 2

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Tamgadge, Y. S., and Gajanan G. Muley. "Studies on Thermally Stimulated Nonlinear Absorption in Gelatin Stabilized Cu-PVP Nanocomposite Thin Films." Materials Science Forum 863 (August 2016): 85–89. http://dx.doi.org/10.4028/www.scientific.net/msf.863.85.

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This article reports investigations on thermally stimulated third order nonlinear absorption in Cu-PVP nanocomposite thin films. Cu nanoparticles have been obtained using chemical reduction method and thin films of Cu-PVP nanocomposites have been obtained using spin coating technique. Thin films have been characterized by X-ray diffraction (XRD), Ultraviolet-visible (UV-vis) spectroscopy, Fourier infra-red (FT-IR) spectroscopy, etc. for structural and linear optical studies. Third order nonlinear absorption studies have been performed using open aperture z-scan technique under continuous wave

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Abdullmajed, Hasanain A., H. A. Sultan, Rafid H. Al-Asadi, Qusay M. A. Hassan, Asaad A. Ali, and C. A. Emshary. "Synthesis, DFT calculations and optical nonlinear properties of two derived Schiff base compounds from ethyl-4-amino benzoate." Physica Scripta 97, no. 2 (2022): 025809. http://dx.doi.org/10.1088/1402-4896/ac3fd1.

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Abstract Two Schiff base compounds viz., Ethyl (E)-4-((3-ethoxy-2-hydroxybenzylidene)amino)benzoate(EHB) and Ethyl (E)-4-(((2-hydroxynaphthalen-1-yl)methylene)amino)benzoate(ENB) are synthesized by condensation of ethyl-4-amino benzoate with 2-hydroxy-3-ethoxy benzaldehyde and 2-hydroxy-1-naphthaldehyde. The two compounds are studied and identified by FT-IR, UV-visible, Mass, 1H-NMR, and 13C-NMR spectroscopies. The nonlinear refractive index (NRI) of the two compounds are determined, for ENB compound via the diffraction ring patterns (DRPs) and the Z-scan and via Z-scan for the EHB compound, u

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Elias, Rita S., Qusay M. A. Hassan, H. A. Sultan, Ahmed S. Al-Asadi, Bahjat A. Saeed, and C. A. Emshary. "Thermal nonlinearities for three curcuminoids measured by diffraction ring patterns and Z-scan under visible CW laser illumination." Optics & Laser Technology 107 (November 2018): 131–41. http://dx.doi.org/10.1016/j.optlastec.2018.05.012.

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Alnayli, Raad Sh, and Hanan Alkazaali. "Properties Studies of Silver Nanoparticles Colloids in Ethanol Prepared by Means Pulses Laser." Journal of Nano Research 60 (November 2019): 154–61. http://dx.doi.org/10.4028/www.scientific.net/jnanor.60.154.

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In this work we study the influence of the laser pulses silver nanoparticles productivity during laser ablation of silver immersed in liquid. Ag nanoparticles were synthesized by pulsed laser ablation of Ag targets in ethanol using the (1064 nm, Q-switched, Nd:YAG) laser with energy of 140 mJ per pulse. UV-Visible absorption spectra were used for the characterization and comparison of products. The non-linear refractive index and absorption coefficient of silver nanoparticles were investigated using a single beam z-scan technique; the excitation source was a continuous wave (CW) of 650 nm diod

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Jalil, Muhammad Arif Bin. "Measurement of Non-Linear Optical Absorption of PVC/TiO2 Nanocomposite via Z-Scan Technique for Optical Limiting." International Journal for Research in Applied Science and Engineering Technology 11, no. 10 (2023): 1586–90. http://dx.doi.org/10.22214/ijraset.2023.56262.

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Abstract: This research focuses on PVC/TiO2 nanocomposites in the form of thin films in order to expand our understanding of photonics technology. For fabrication of the thin films, the casting method was used with nanocomposites composite were developed by mixing TiO2 nanoparticles with Polyvinyl Chloride (PVC) as the polymer matrix. The absorbance parameters were determined using spectral analysis, and the linear absorption coefficient was computed. A single beam Z-scan technique was used to evaluate the nonlinear refractive index and nonlinear absorption coefficient via a CW diode pumped so

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Shubar, M. Y., H. L. Saadon, and Saeed J. Abbas. "Nonlinear optical switching and all-figures of merit in Bi2S3-xSex/PMMA nanocomposite films investigated by Z scan under visible CW laser." Chinese Optics Letters 18, no. 1 (2020): 011902. http://dx.doi.org/10.3788/col202018.011902.

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ARA, M. H. MAJLES, Z. DEHGHANI, and S. SAIEVAR IRANIZAD. "SYNTHESIS, CHARACTERIZATION AND SINGLE-BEAM Z-SCAN MEASUREMENT OF THE THIRD-ORDER OPTICAL NONLINEARITIES OF ZnO NANO-PARTICLES." International Journal of Modern Physics B 22, no. 18n19 (2008): 3165–71. http://dx.doi.org/10.1142/s0217979208048061.

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Nano-particle materials with large optical nonlinearities are in great need for the development of nonlinear optical technology and are being studied intensively in recent years. ZnO nanoparticles have been synthesized by precipitation from zinc acetate in a series of n-alkanols from ethanol to 1-hexanol as a function of temperature. The formation and microstructure of ZnO particles were monitored by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-Vis spectrum and z-scan technique. We studied the optical limiting effect of ZnO nano-particles. Using a CW He - Ne laser at 632.8 n

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HENARI, FRYAD Z., and ABDULLAH M. ASIRI. "NON-LINEAR REFRACTIVE INDEX MEASUREMENT OF (2E)-3-[4-(DIMETHYLAMINO)PHENYL]-1-(2,5-DIMETHYLTHIOPHEN-3-YL)PROP-2-EN-1-ONE AND (2E)-3-(3,4-DIMETHOXYPHENYL)-1-(2,5-DIMETHYLTHIOPHEN-3-YL)PROP-2-EN-1-ONE." Journal of Nonlinear Optical Physics & Materials 20, no. 02 (2011): 183–91. http://dx.doi.org/10.1142/s0218863511006005.

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We report results from investigations of the nonlinear refractive index and nonlinear absorption coefficient of (2E)-3-[4-(Dimethylamino)phenyl]-1-(2,5-dimethylthiophen-3-yl)prop-2-en-1-one and (2E)-3-(3,4-Dimethoxyphenyl)-1-(2,5-dimethylthiophen-3-yl) prop-2-en-1-one using Z-scan technique with a continuous wave (cw) laser at wavelengths 488 nm and 514 nm. The nonlinear refractive index and nonlinear absorption coefficient of both samples were evaluated. The origin of the nonlinear effects was discussed. Optical limiting based on light induced nonlinear refractive index variation is demonstra

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P., A. Praveen, P. Prabhakaran S., Ramesh Babu R., Sethuraman K., and Ramamurthi K. "Low power optical limiting studies on nanocrystalline benzimidazole thin films prepared by modified liquid phase growth technique." Bulletin of Materials Science 38, no. 3 (2014): 645–51. https://doi.org/10.5281/zenodo.838404.

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In the present work, benzimidazole (BMZ), a well known nonlinear optical material, thin films were deposited using the modified liquid phase growth technique at different solution temperatures. The prepared samples were subjected to spectral, structural and surface analyses. Linear optical properties and third-order optical nonlinearity of the deposited BMZ thin films were analysed using UV–visible–NIR spectrum and Z-scan technique, respectively. The experimental results show that the BMZ films exhibit reverse saturable absorption and positive nonlinearity at 650 nm CW laser of power 5 mW. The

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Takeyama, N., Y. Ohgiya, H. Itokawa, et al. "Comparison of 40 and 60 milliliters of contrast in assessment of the carotid artery by computed tomography angiography." Acta Radiologica 49, no. 9 (2008): 1068–78. http://dx.doi.org/10.1080/02841850802403748.

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Background: Although fast acquisition of multidetector-row computed tomography (MDCT) can make it possible to acquire sufficient early vascular enhancement using small volumes and high concentrations of contrast material (CM), there are still some problems with nephrotoxicity and costs related to CM. Purpose: To compare the qualitative and quantitative performance in cervicocranial CT angiography (CTA) using two different iodine volumes and concentrations of CM. Material and Methods: CTA ranging from the aortic arch (AA) to distal to the circle of Willis (cW) was performed on a 32-MDCT system.

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Ibrahim, Aseel, Rawa Ibrahim, Ali Abdullah, et al. "Study The Influence of Doping Electric and Magnetic Nanoparticles on The Nonlinear Optical Properties of Nematic Liquid Crystals." Iraqi Journal of Physics (IJP) 18, no. 47 (2020): 91–99. http://dx.doi.org/10.30723/ijp.v18i47.578.

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The nonlinear optical properties response of nematic liquid crystal (6CHBT) and the impact of doping with two kinds of nanoparticles; Fe3O4 magnetic nanoparticles and SbSI ferroelectric nanoparticles have been studied using the non-linear dynamic method through z-scan measurement technique. This was achieved utilizing CW He-Ne laser. The pure LC and magnetic LC nanoparticle composite samples had a maximum absorption while the ferroelectric LC nanoparticle composite had a minimum absorption of the incident light. The nonlinear refractive index was positive for the pure LC and the rod-like ferro

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Yaseen, Hanaa M., Slafa I. Ibrahim, and Rajaa Nader Ketan. "Optical Characteristics of Vitamin D3 Soft Gel." Iraqi Journal of Physics (IJP) 19, no. 50 (2021): 31–42. http://dx.doi.org/10.30723/ijp.v19i50.660.

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In this work, the linear properties of Vitamin D3-5000IU soft gel were investigated by measuring its absorption and fluorescence spectra. It was observed that there was a shift towards longer wavelength within limits (75 nm), with quantitative efficiency equal to (33.58%). The values of absorbance were used to calculate the extinction coefficient, optical refractive index, optical conductivity and optical dielectric constant values. The non-linear properties of Vitamin D3-5000IU soft gel was also studied using the Z-Scan technique by using Neodymium-doped Yttrium Garnet (Nd: YAG) continu

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Al-Dergazly, Anwaar A. "Investigation of dispersion and nonlinear characteristics of liquid core optical fiber filled with olive oil." Sustainable Engineering and Innovation 2, no. 1 (2020): 34–40. http://dx.doi.org/10.37868/sei.v2i1.102.

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This paper introduces a prospective material for photonic laser applications. Different high purity samples of olive oil were subjected to spectrophotometer to determine the absorption spectra. The transmission behavior of olive oil is about (44.28) % at wavelength of 532 nm, while it is (62.94) % at 1064 nm. Then, the nonlinear optical properties represented by nonlinear refractive index and nonlinear absorption coefficient are determined using a highly sensitive method known as Z-scan technique. Z-Scan experiment was performed using a 1064 nm CW Nd:YAG and 532 nm SHG Nd:YVO4 lasers. n2 = 3.9

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Saeed, Abdu, Mir A. N. Razvi, and Numan Salah. "Third-order nonlinear optical properties of the small-molecular organic semiconductor tris (8-Hydroxyquinoline) aluminum by CW Z-scan technique." Results in Physics 24 (May 2021): 104162. http://dx.doi.org/10.1016/j.rinp.2021.104162.

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Abbas, Bassam, and Mohammad Alshikh Khalil. "Third-order optical nonlinearity of DSR13/THF solutions under CW He–Ne laser irradiation using Z-scan method." Canadian Journal of Physics 100, no. 1 (2022): 53–59. http://dx.doi.org/10.1139/cjp-2018-0991.

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The Z-scan technique was employed to explore the third-order nonlinear optical properties of disperse red 13 organic chromophore solutions in tetrahydrofuran. A continuous-wave He–Ne laser (632.8 nm) was used as a source of irradiation. The nonlinear absorption and nonlinear refractive index coefficients of this dye were investigated. The results showed that this dye has a good nonlinear response with its real and imaginary quantities of third-order susceptibility. The solutions showed negative nonlinear refraction. The best obtained value of the third-order susceptibility was 6.37 × 10–3 esu

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Razvi, M. A. N., Ahmed H. Bakry, S. M. Afzal, Salman A. Khan, and Abdullah M. Asiri. "Synthesis, characterization and determination of third-order optical nonlinearity by cw z-scan technique of novel thiobarbituric acid derivative dyes." Materials Letters 144 (April 2015): 131–34. http://dx.doi.org/10.1016/j.matlet.2015.01.036.

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Zafar, Sana, Md Shahzad Khan, Zahid H. Khan, and Mohd Shahid Khan. "Study of Nonlinear Optical Properties of Amino Substituted Organic Dye by Z-Scan Technique Using CW Laser and DFT Calculations." Advanced Science Letters 21, no. 9 (2015): 2734–37. http://dx.doi.org/10.1166/asl.2015.6349.

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Rajeev Gandhi, J., M. Rathnakumari, K. Ramamurthi, R. Ramesh Babu, D. Sastikumar, and P. Sureshkumar. "Measurement of nonlinear refractive index of pure and doped KTP crystals by Z-scan technique using cw He–Ne Laser." Optik 125, no. 21 (2014): 6462–65. http://dx.doi.org/10.1016/j.ijleo.2014.06.162.

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Dehghani, Zahra, Esmaiel Saievar Iranizad, Abbas Faraji Alamouti, and Marzieh Nadafan. "Optical Properties of Synthesized Fe₃O₄ Nanoparticles Doped in Nematic Liquid Crystal under Electric Field." Advanced Materials Research 829 (November 2013): 836–40. http://dx.doi.org/10.4028/www.scientific.net/amr.829.836.

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The average particle size of synthesized nanoparticles (nps) was found to be about 34 nm as analyzed using scanning electron microscopy (SEM). The nonlinear optics measurements were performed by using z-scan method with 532 nm wavelength CW Nd:YAG laser. The influence of electric field on the nonlinear optical responses for nematic liquid crystals (NLCs) doped with nps was considered in different voltages. The measurements were performed with ferronematics for two commonly initial alignments (homogeneous and homeotropic) with small compositional percentage of magnetic nps (i.e. 1% W/W). The ex

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Hussain, Mahmoud Sh, Qusay M. A. Hassan, H. A. Sultan, Ahmed S. Al-Asadi, Hani T. Chayed, and C. A. Emshary. "Preparation, characterization, and study of the nonlinear optical properties of a new prepared nanoparticles copolymer." Modern Physics Letters B 33, no. 36 (2019): 1950456. http://dx.doi.org/10.1142/s0217984919504566.

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The nonlinear optical properties of a nanoparticle polyaniline/polyacrylonitrile (PAn/PANr) copolymer newly prepared via experimental and theoretical findings are reported. Diffraction ring patterns result in the far field when a CW, visible, 473 nm, low power laser beam traverses the solution of PAn/PANr in the solvent ethanol. The diffraction ring patterns are usually used to estimate the nonlinear refractive index while the Z-scan is used to measure both nonlinear refractive index and its sign and nonlinear absorption coefficient. The experimentally observed ring patterns are numerically re

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DAKHEL, A. A., and F. Z. HENARI. "OPTICAL AND STRUCTURAL PROPERTIES OF SILVER NANOPARTICLES EMBEDDED IN INDIUM OXIDE FILMS." International Journal of Nanoscience 10, no. 03 (2011): 433–40. http://dx.doi.org/10.1142/s0219581x11008186.

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Nanoparticles of silver-embedded indium oxide thin films have been prepared on glass and silicon substrates. Silver concentration were 3 wt.% and 5 wt.% as measured by X-ray fluorescence. X-ray diffraction reveals that indium oxide of these samples remains amorphous even after pre-annealing at 400°C. The optical absorption of the samples manifests the surface plasmon resonance (SPR) phenomena, which varies with Ag content. The Ag nanoparticles radius was estimated with Mie classical theory by using the SPR data analysis. The nonlinear optical properties of films on glass substrate were investi

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Tripathy, Umakanta, and Prem B. Bisht. "Influence of pulsed and cw pumping on optical nonlinear parameters of laser dyes probed by a closed-aperture Z-scan technique." Journal of the Optical Society of America B 24, no. 9 (2007): 2147. http://dx.doi.org/10.1364/josab.24.002147.

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