Study on the Third-Order Nonlinear Optical Properties of Cd2+ Ion Doped Zns/PVP Nanocomposite FilmsB. Suresh1, S. Ramachandran1 and G. Shanmugam2

Abstract Cd2+ ion doped ZnS/PVP nanocomposite films have been prepared using in-situ chemical method. XRD studies confirm the cubic structure of ZnS for all the films and the nanocrystallite size of ZnS is found to varying from 3.82 to 4.07 nm with Cd doping. The morphology of the films has been analyzed using SEM micrograph which shows the mono dispersion of ZnS nanoparticles in PVP matrix. The interaction between ZnS nanoparticles and PVP polymer matrix has been discussed using FTIR spectra. Optical absorption spectra of the films reveal the blue shift on the absorbance onset with the comparison of bulk ZnS and the estimated optical band gap energy decreases with increasing the concentration of Cd dopant. Photoluminescence spectra show a blue emission peak for all the films. The Z-scan results of three samples show a reverse saturation absorption process in open Z-scan experiment and self-focusing behavior in closed Z-scan experiment. Both ZnS/PVP and Cd2+ ion doped ZnS/PVP films exhibited the large optical nonlinearity and the value of nonlinear refractive index (n2), nonlinear absorption coefficient (β), third-order nonlinear optical susceptibility (χ(3)) and figure of merit (FOM) increase with Cd doping. The estimated n2, β, χ(3) and FOM values were found to be high for 6 mol% Cd doped ZnS/PVP nanocomposite film and they are about 1.771⋅10− 10 m2 W− 1, 4.148⋅10− 3 mW− 1, 1.603⋅10− 4 esu and 9.576⋅10− 6 esu m respectively. The experimental results clearly showed that the Cd2+ ion doped ZnS/PVP nanocomposite film is a worthy candidate for the future nonlinear optical device fabrication.

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Enhancement of third-order nonlinear optical properties of HMTA stabilized pure and doped ZnS nanoparticles and their electronic structures

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863518500169 ◽

2018 ◽

Vol 27 (02) ◽

pp. 1850016 ◽

Cited By ~ 6

Author(s):

K. Vijai Anand ◽

G. Vinitha ◽

Sanjeev Gautam ◽

K. H. Chae ◽

R. Mohan ◽

...

Keyword(s):

Transition Metals ◽

Electronic Structures ◽

Nonlinear Optical ◽

Zns Nanoparticles ◽

Third Order ◽

Tetrahedral Symmetry ◽

Nonlinear Optical Susceptibility ◽

Nlo Properties ◽

The Third ◽

Mn Doped

This study reports the third-order nonlinear optical (NLO) properties of hexamethylenetetramine (HMTA) stabilized pure and transition metals (Cu, Co and Mn) doped ZnS nanoparticles (NPs) and their electronic structures. The third-order NLO properties of pure and transition metals (Cu, Co and Mn) doped ZnS NPs were measured by [Formula: see text]-scan technique. From these measurements, the pure and doped ZnS samples exhibit negative nonlinearity i.e., self-defocusing. The open aperture [Formula: see text]-scan measurement shows saturated absorption within the medium. The prepared pure and doped ZnS samples exhibit nonlinear refractive index of the order of 10[Formula: see text][Formula: see text](cm2/W), nonlinear absorption (NLA) coefficient of the order of 10[Formula: see text][Formula: see text]cm/W and nonlinear optical susceptibility of the order of 10[Formula: see text][Formula: see text]esu. The electronic structures of these ZnS NPs were investigated using near edge X-ray absorption fine structure (NEXAFS) measurements at the C K-, N K- and Co L[Formula: see text]-edges. The C K- and N K-edges XANES spectra reveal the appearance of several spectral features in the range 285–290[Formula: see text]eV and 390–430[Formula: see text]eV respectively. The Co L[Formula: see text]-edge NEXAFS spectrum exhibits multiplet absorption lines similar to those of Co[Formula: see text] ions coordinated in tetrahedral symmetry with four sulfur nearest neighbors. These results clearly demonstrate that divalent Co ions substitute Zn sites. From the Raman spectra, the appearance of multiple resonance Raman peaks indicates that the prepared ZnS samples have good optical quality.

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Z-SCAN DETERMINATION OF THE THIRD-ORDER OPTICAL NONLINEARITY OF ORGANIC DYE NILE BLUE CHLORIDE

Modern Physics Letters B ◽

10.1142/s0217984906010779 ◽

2006 ◽

Vol 20 (11) ◽

pp. 623-632 ◽

Cited By ~ 37

Author(s):

QUSAY MOHAMMED ALI ◽

P. K. PALANISAMY

Keyword(s):

Refractive Index ◽

Nonlinear Refractive Index ◽

Nonlinear Optical ◽

Nile Blue ◽

Optical Nonlinearity ◽

Organic Dye ◽

Photon Absorption ◽

Third Order ◽

Nonlinear Optical Susceptibility ◽

The Third

The single beam Z-scan technique was used to determine the nonlinear optical properties of the organic dye Nile Blue chloride in the solvent ethanol. The experiments were performed with a He-Ne laser with a wavelength of 632.8 nm. The negative nonlinear refractive index and two-photon absorption coefficient were observed in this dye. The intensity-dependent nonlinear refractive index was investigated. The result shows that the dye exhibits a great nonlinear response with the real and imaginary parts of the third-order nonlinear optical susceptibility χ(3) being -4.12×10-5 esu and 1.35×10-6 esu, respectively. These results show that the Nile Blue chloride dye has potential applications in nonlinear optics.

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Enhanced third-order nonlinear optical properties of high purity ZnS nanoparticles

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863515500162 ◽

2015 ◽

Vol 24 (02) ◽

pp. 1550016 ◽

Cited By ~ 9

Author(s):

K. Vijai Anand ◽

G. Vinitha ◽

M. Karl Chinnu ◽

R. Mohan ◽

R. Jayavel

Keyword(s):

High Purity ◽

Nonlinear Optical ◽

Continuous Wave ◽

Zinc Acetate Dihydrate ◽

Optical Nonlinearity ◽

Single Step ◽

Saturable Absorption ◽

Zns Nanoparticles ◽

Third Order ◽

Air Atmosphere

This paper reports on the preparation of high purity ZnS nanoparticles by a facile single step solvent-free route via thermal decomposition of zinc acetate dihydrate and thiourea in air atmosphere. The third-order optical nonlinearity of the prepared ZnS nanoparticles were measured by Z-scan technique using continuous wave 532-nm diode pumped Nd:YAG laser. From nonlinear optical (NLO) measurements, the prepared ZnS nanoparticles possess negative nonlinearity i.e., self-defocusing. Open aperture Z-scan measurement shows saturable absorption within the medium. These results show that the prepared ZnS nanoparticles are promising candidate for various potential applications in the field of nonlinear optics.

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Nanostructured Silver/Polystyrene Composite Film: Preparation and Ultrafast Third-Order Optical Nonlinearity

Polymers and Polymer Composites ◽

10.1177/096739110201000404 ◽

2002 ◽

Vol 10 (4) ◽

pp. 291-298 ◽

Cited By ~ 2

Author(s):

Rong Zeng ◽

Shu Feng Wang ◽

Hai Chun Liang ◽

Min Zhi Rong ◽

Ming Qiu Zhang ◽

...

Keyword(s):

Optical Nonlinearity ◽

Nanocomposite Films ◽

Third Order ◽

Nonlinear Optical Susceptibility ◽

Time Resolved ◽

Optical Susceptibility ◽

Polystyrene Matrix ◽

Micro Emulsion ◽

Surface Modified ◽

Effect Experiment

Surface-modified silver nanoparticles with various sizes, synthesized by water-in-oil micro-emulsion, were incorporated into polystyrene (PS) to form transparent nanocomposite films through solution-mixing and static-casting. It was found that the Ag nanoparticles could be re-dispersed well in the polymer matrix by using chloroform as a solvent due to a strong interaction between Ag and chloroform. XPS analysis suggested that there is no obvious interaction between nanosilver and the polystyrene matrix. The third-order nonlinear optical susceptibility of Ag/PS nanocomposite films is around 10-esu and increases with increasing particle size, as measured by the time-resolved femtosecond optical Kerr effect experiment at a wavelength of 830nm. The results demonstrate that the present fabrication approach can effectively tailor the structure and properties of the nanocomposites.

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Tunable Nonlinear Optical Property of MnS Nanoparticles with Different Size and Crystal Form

Nanomaterials ◽

10.3390/nano10010034 ◽

2019 ◽

Vol 10 (1) ◽

pp. 34

Author(s):

Zhihao Zhang ◽

Pengchao Li ◽

Yuzong Gu

Keyword(s):

Optical Property ◽

Nonlinear Optical ◽

Nonlinear Optical Property ◽

Nonlinear Refraction ◽

Synthesis Method ◽

Crystal Form ◽

Optical Nonlinearity ◽

Photon Absorption ◽

Third Order ◽

Crystal Forms

It is significant to study the reason that semiconductor material has adjustable third-order optical nonlinearity through crystal form and dimensions are changed. αMnS nanoparticles with different crystal forms and sizes were successfully prepared by one-step hydrothermal synthesis method and their size-limited third-order nonlinear optical property was tested by Z-scan technique with 30 ps laser pulses at 532 nm wavelength. Nanoparticles of different crystal forms exhibited different NLO (nonlinear optical) responses. γMnS had stronger NLO response than αMnS because of higher fluorescence quantum yield. Two-photon absorption and the nonlinear refraction are enhanced as size of nanoparticlesreduced. The nanoparticles had maximum NLO susceptibility which was 3.09 × 10−12 esu. Susceptibility of αMnS increased about nine times than that of largest nanoparticles. However, it was reduced when size was further decreased. This trend was explained by the effects of light induced dipole moments. And defects in αMnS nanoparticles also had effect on this nonlinear process. MnS nanoparticles had potential application value in optical limiting and optical modulation.

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