Abstract
Based on nonlinear self- diffraction technique, the nonlinear optical properties of thin slice of matter can be obtained. Here, nonlinear characterization of nano-fluids consist of hybrid Single Wall Carbon Nanotubes and Silver Nanoparticles (SWCNTs/Ag-NPs) dispersed in acetone at volume fraction of 6x10-6, 9x10-6, 18x10-6 have been investigated experimentally. Therefore, CW DPSS laser at 473 nm focused into a quartz cuvette contains the previous nano-fluid was utilized. The number of diffraction ring patterns (N) has been counted using Charge - Coupled- Device (CCD) camera and Pc with a certain software, in order to find the maximum change of refractive index ( of fluids. Our result show that the fraction volume of 18x10-6 is more nonlinearity than others.
Highlights
Nonlinear optical effects have attracted much interest for their huge capability in employments such as, self-phase modulation, multiplephoton absorption and frequency conversion [1,2,3]
Nonlinear concentric ring can be revealed as far field nonlinear diffraction patterns when a Gaussian laser beam illuminates a thin slice of matte [4,5,6]
Power-meter, attenuator, Charge - Coupled- Device (CCD) camera and PC have been used in this experiment as it can be shown in the Fig
Summary
Nonlinear optical effects have attracted much interest for their huge capability in employments such as, self-phase modulation, multiplephoton absorption and frequency conversion [1,2,3]. Zeta potential is an important and useful indicator of this charge which can be used to predict and control the stability of suspention.Therefor, zeta potential examination was measurd for the suspension at volum fraction 9 x 10-6, which was almost (-63.12) It has been noticed that the nonlinear refractive index of the suspension increases by increasing the volume fraction values of nanoparticles inside the solution It can be attributed these increment due to the physical concept, that the hybrid metal nanoparticles (SWCNT/ AgNPs) spread in fluid lead absorption the light energy due to Surface Plasmonic Resonance (SPR) of the free electrons excitation on the metal surface. On the other hand the absorption light energy based on SPR is more powerful when the volume fraction values of the particles is high
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