|
Title
|
Synthesis, band gap structure and third order non-linear optical properties of zinc tungsten oxide nanocomposite using a single CW laser beam
|
|
Type
|
JournalPaper
|
|
Keywords
|
zinc tungsten oxide, Z-scan measurement, saturation absorption, thermal lensing, third order non-linear optical
|
|
Abstract
|
In this study, a composite of zinc tungsten oxide nanoparticles (W-ZnO NPs) has been synthesized via mixing Na2WO4 and zinc acetate in water, followed by dropwise addition of NaOH. The synthesized W-ZnO NPs were characterized using measurement methods such as XRD, dynamic light scattering (DLS), Scanning electron microscopy (SEM) and UV-Vis. Also, the results were compared with the pure synthesized ZnO and WO3 NPs. Non-linear optical properties of the synthesized composite were measured using the Z-scan technique with a continuous wave Nd-Yag laser. The negative non-linear absorption coefficient of the components was obtained which indicates that the saturation absorption occurred in this composite. In comparison with pure ZnO NPs, non-linear absorption decreases which can be attributed to the negligible optical response of WO3 structures. Also, the negative value of the close aperture Z-scan curve shows that the thermal lensing effect is the main reason for the third-order non-linear refraction
|
|
Researchers
|
Behrooz Maleki (Fifth Researcher), Reza Tayebee (Fourth Researcher), Amir Hossein Ehsanian (Third Researcher), Ehsan Koushki (Second Researcher), Zahra Jalili (First Researcher)
|