Diffraction Rings Pattern and Nonlinear Optical Properties of Hybrid ZnO-NPs / Epoxy Resin

In this research, the diffraction ring patterns scan and single-beam Z-scan techniques were used to measure the nonlinear refractive index (n2) and nonlinear absorption coefficient (β). Nano-composite sample, which consists of zinc oxide nanoparticles (ZnO-NPs), and epoxy resin polymer. The sample was prepared by the casting method. A second harmonic generation Nd: YAG laser, which operates at 532 nm and intensity 3183 W/cm2 was used for the two techniques. Z-scan results showed that values for nonlinear refractive index n2 and nonlinear absorption coefficient β were obtained of 6.59*10-9 cm2/W and 1.75*10-3 cm/W respectively. While results for the D-scan technique showed that the number of rings increases with the increasing of laser power.

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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 ◽

10.1142/s2010194512002139 ◽

2012 ◽

Vol 05 ◽

pp. 277-283 ◽

Cited By ~ 1

Author(s):

M. H. MAJLES ARA ◽

Z. DEHGHANI

Keyword(s):

Refractive Index ◽

Absorption Coefficient ◽

Nonlinear Absorption ◽

Nonlinear Refractive Index ◽

Optical Limiting ◽

Nonlinear Absorption Coefficient ◽

Third Order ◽

Nano Composite ◽

Single Beam ◽

The Third

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) and nonlinear absorption (β) of TiO 2/ PS nano-composite were determined by use of both the closed-aperture and opened-aperture z -scan techniques. Z -scan technique, developed by Sheik-Bahae et al., has been used widely in material characterization. A single-beam (also called z -scan method) for measuring the sign and magnitude of nonlinear refraction that has simplicity and very high sensitivity has been reported recently. Optical limiting property of TiO 2/ PS nano-composite is studied. The positive sign obtained for nonlinear refractive index indicated that there is a self-focusing effect in the sample. The nonlinear refractive index was in order of 10-8 (cm2/W) and the nonlinear absorption coefficient was obtained in order of 10-2 (cm/W) with negative sign. The values of nonlinear refractive index and nonlinear absorption coefficient are enhanced by decreasing the intensity.

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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 ◽

10.1142/s0218863511006005 ◽

2011 ◽

Vol 20 (02) ◽

pp. 183-191 ◽

Cited By ~ 3

Author(s):

FRYAD Z. HENARI ◽

ABDULLAH M. ASIRI

Keyword(s):

Refractive Index ◽

Absorption Coefficient ◽

Nonlinear Absorption ◽

Nonlinear Refractive Index ◽

Continuous Wave ◽

Nonlinear Effects ◽

Optical Limiting ◽

Nonlinear Absorption Coefficient ◽

Refractive Index Measurement ◽

Index Measurement

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 demonstrated. The limiting thresholds were estimated for both samples. The results suggested that these materials offer promise as candidates for optical limiting and optical devices in the low power regime.

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Measurement of Nonlinear Refractive Index and Nonlinear Absorption Coefficient Using Transmission Spectrum

Japanese Journal of Applied Physics ◽

10.7567/jjaps.34s1.170 ◽

1995 ◽

Vol 34 (S1) ◽

pp. 170

Author(s):

X. Q. Zhang ◽

X. W. Fan ◽

D. Z. Shen ◽

L. C. Chen ◽

A. H. Yang ◽

...

Keyword(s):

Refractive Index ◽

Absorption Coefficient ◽

Transmission Spectrum ◽

Nonlinear Absorption ◽

Nonlinear Refractive Index ◽

Nonlinear Absorption Coefficient

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USING Z-SCAN TECHNIQUE TO MEASURE THE NONLINEAR OPTICAL PROPERTIES OF PMMA/ZNO NANOCOMPOSITES

Jurnal Teknologi ◽

10.11113/jt.v78.7461 ◽

2016 ◽

Vol 78 (3) ◽

Cited By ~ 4

Author(s):

Haider Mohammed Shanshool ◽

Muhammad Yahaya ◽

Wan Mahmood Mat Yunus ◽

Ibtisam Yahya Abdullah

Keyword(s):

Thin Film ◽

Refractive Index ◽

Optical Properties ◽

Absorption Coefficient ◽

Zno Nanoparticles ◽

Nonlinear Absorption ◽

Nonlinear Refractive Index ◽

Optical Switching ◽

Nonlinear Optical ◽

Nonlinear Absorption Coefficient

The study of nonlinear optical properties of polymer nanocomposites has been given increasing attention due its application in laser, communication and data storage technology. There is a need to enhance the understanding of all photonics technologies. In the current work, PMMA-ZnO nanocomposites as foils and as thin films have been successfully prepared. Casting method and spin coating were used to prepare them respectively. Nanocomposites were prepared by mixing ZnO nanoparticles with polymethyl methacrylate (PMMA) as the polymer matrix. Different contents of ZnO nanoparticles were used as the filler in the nanocomposites. The absorbance spectra of the samples were obtained. The linear absorption coefficient was calculated. The nonlinear refractive index and nonlinear absorption coefficient were investigated using a single beam Z-scan technique. A Q-switched Nd-YAG pulsed laser (532 nm, 7 ns, 5 Hz) was used as a light source. Both thin film’s and foil’s samples showed peak absorption at 375 nm and increasing absorption with ZnO nanoparticles concentration. The nonlinear refractive index was in the order of 10-11 cm2/W for thin film samples and 10-12 cm2 /W for foil’s samples with a negative sign. In contrast, the nonlinear absorption coefficient is in the order of 10-6 cm/W and 10-7 cm /W for thin film and foil respectively. The figures of merit W and T were calculated in order to evaluate the suitability of the samples as optical switching device .However; they unsatisfied the requirements of optical switching devices but they can be considered as an excellent candidate for optical limiting.

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NONLINEAR-OPTICAL AND OPTICAL LIMITING PROPERTIES OF PHENOXY-PHTHALOCYANINES STUDIED USING THE Z-SCAN TECHNIQUE

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863509004907 ◽

2009 ◽

Vol 18 (04) ◽

pp. 583-589 ◽

Cited By ~ 13

Author(s):

YUNDONG ZHANG ◽

LEI MA ◽

CHAOBO YANG ◽

PING YUAN

Keyword(s):

Absorption Coefficient ◽

Low Power ◽

Pulse Laser ◽

Nonlinear Absorption ◽

Nonlinear Optical ◽

Optical Limiting ◽

Nonlinear Absorption Coefficient ◽

Potential Candidate ◽

Single Beam ◽

532 Nm

The nonlinear-optical and optical limiting properties of 2(3), 9(10), 16(17), 23(24) phenoxy-phthalocyanines have been investigated using a 10-ns-pulse laser at 532 nm. The nonlinear absorption coefficient (β) is measured by the single beam Z-scan technique. We have observed low power optical limiting, with low limiting thresholds, based on nonlinear absorption in the sample. These studies indicate that the phthalocyanine material is a potential candidate for low power optical limiting applications.

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NONLINEAR OPTICAL PROPERTIES AND OPTICAL POWER LIMITING OF THE PREPARED POLYMER BLEND POLY (3HT- Co - Th) - PM FILMS

International Journal of Engineering Science Technologies ◽

10.29121/ijoest.v5.i1.2021.142 ◽

2021 ◽

Vol 5 (1) ◽

pp. 1-10

Author(s):

Imad Al-Deen Hussein Ali Al-Saidi ◽

Hussein Falih Hussein ◽

Numan Sleem Hashim

Keyword(s):

Refractive Index ◽

Optical Properties ◽

Absorption Coefficient ◽

Polymer Blend ◽

Nonlinear Absorption ◽

Nonlinear Refractive Index ◽

Nonlinear Optical ◽

Optical Power ◽

Copolymer Poly ◽

Optical Power Limiting

Poly (3 - Hexylthiophene - Co - Thiophene) copolymer was prepared by using the addition polymerization method. The Nonlinear optical properties and the behavior of the optical power limiting of the prepared polymer blend poly (3HT- Co - Th) - PMMA films were studied by using the z - scan technique for different weight ratios of the copolymer poly (3HT- Co - Th). In the present work, a continuous wave (CW) diode - pumped solid - state laser (DPSSL) of wavelengths 532 nm was used for the irradiation of the prepared film samples. The nonlinear optical parameters such as, the nonlinear refractive index (n2), the nonlinear absorption coefficient (β), and the third - order - nonlinear optical susceptibility (χ (3)) of the polymer blend poly (3HT- Co - Th) - PMMA films were determined for different weight ratios of the copolymer poly (3HT- Co - Th). It is observed that the polymer blend poly (3HT - Co - Th) - PMMA films exhibit saturable absorption (SA) and self - defocusing effects, and this gives an indication that both, the nonlinear refractive index (n2) and the nonlinear absorption coefficient (β), have negative values. The obtained results indicate that the prepared polymer blend poly (3HT - Co - Th) - PMMA films are promising materials and can be considered as suitable materials for different optical and electronic applications.

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