Results 11 to 20 of about 388,376 (214)

Nonlinear optical properties of Au-nanoparticles conjugated with lipoic acid in water [PDF]

open access: yesJournal of the European Optical Society-Rapid Publications, 2014
Gold nanoparticles were chemically conjugated with lipoic acid to control their optical properties. Z-scan and other optical techniques were used to characterize the non-linear behavior of the resulting nanostructured materials. The results show that the
Trejo-Durán M.   +4 more
doaj   +1 more source

Facile One-Step Synthesis and Enhanced Optical Nonlinearity of Graphene-γMnS

open access: yesNanomaterials, 2019
Graphene-γMnS were prepared by facile one-step hydrothermal method. Structures and properties of samples were explored by characterization, and nonlinear optical (NLO) enhancement of nanocomposites (NCs) was fully studied. Nanoparticles and NCs were
Zhihao Zhang   +3 more
doaj   +1 more source

Z-Scan theory for thin film measurements: Validation of a model beyond the standard approach using ITO and HfO2

open access: yesOptical Materials: X, 2023
The Z-Scan technique is an easy and widespread approach to evaluate the nonlinear optical coefficient of materials. However, the evaluation of the same coefficients for thin films requires complex experimental setups that allow to remove the ...
Andrea Tognazzi   +8 more
doaj   +1 more source

A New Composite Fractal Function and Its Application in Image Encryption

open access: yesJournal of Imaging, 2020
Fractal’s spatially nonuniform phenomena and chaotic nature highlight the function utilization in fractal cryptographic applications. This paper proposes a new composite fractal function (CFF) that combines two different Mandelbrot set (MS) functions ...
Shafali Agarwal
doaj   +1 more source

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

open access: yesEngineering and Technology Journal, 2020
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).
Zahraa AL-Asady, Ali AL-Hamdani
doaj   +1 more source

Dual THz Wave and X-ray Generation from a Water Film under Femtosecond Laser Excitation

open access: yesNanomaterials, 2018
Simultaneous emission of the THz wave and hard X-ray from thin water free-flow was induced by the irradiation of tightly-focused femtosecond laser pulses (35 fs, 800 nm, 500 Hz) in air. Intensity measurements of the THz wave and X-ray were carried out at
Hsin-hui Huang   +4 more
doaj   +1 more source

Optical and Photoacoustic Properties of Laser-Ablated Silver Nanoparticles in a Carbon Dots Solution

open access: yesMolecules, 2020
This study used the carbon dots solution for the laser ablation technique to fabricate silver nanoparticles. The ablation time range was from 5 min to 20 min.
Amir Reza Sadrolhosseini   +4 more
doaj   +1 more source

The Two-Photon Absorption Cross-Section Studies of CsPbX3 (X = I, Br, Cl) Nanocrystals

open access: yesNanomaterials, 2020
The CsPbX3 nanocrystals (NCs) with X = I, Br, Cl, or the mixture of Br:I and Br:Cl in a 1:1 ratio were synthesized and characterized by TEM, DLS, and XRD.
Janusz Szeremeta   +4 more
doaj   +1 more source

Optical Characteristics of Vitamin D3 Soft Gel

open access: yesIraqi Journal of Physics, 2021
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
Hanaa M. Yaseen   +2 more
doaj   +1 more source

Size Dependence of the Resonant Third-Order Nonlinear Refraction of Colloidal PbS Quantum Dots

open access: yesPhotonics, 2020
Due to their high resonant third-order nonlinear response, lead sulfide quantum dots (QDs) are potential materials for applications in the field of nonlinear optics.
Ivan D. Skurlov   +7 more
doaj   +1 more source

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