Spectral and third order nonlinear optical properties of Yttrium-doped BaWO4 nanostructures

• Published in: Optical materials Vol. 88; pp. 466 - 471
• Main Authors: Mani Rahulan, K., Annie Sujatha, R., Angeline Little Flower, N., Vinitha, G., Suhana, Ayisha
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01-02-2019
• Subjects: Nanostructures; Saturable absorption; Yttrium; Z-scan; Saturable absorption; Nanostructures; Z-scan; Yttrium
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2018.12.014

BaWO4 nanostructures doped with different concentrations of Yttrium have been synthesized by a chemical method. The as-prepared samples were characterized by UV–vis diffuse reflectance spectra, X-ray diffraction, Fourier transform infrared spectroscopy, Transmission electron microscopy and Raman spectra. From the UV–vis spectra, it is seen that absorption band edge shifted towards the visible region upon Y doping. The X-ray diffraction and Raman analyses reveal that the BaWO4 powders present a tetragonal structure. The third-order nonlinear optical responses of BaWO4 nanostructures on the effect of Y concentrations was investigated by Z-scan technique using a continuous wave Nd:YAG laser at 532 nm. Experimental results have shown that the observed nonlinear absorption and nonlinear refraction behavior is attributed to saturable absorption and thermal nonlinear effects.
•Yttrium doped BaWO4 nanostructures with various concentration of Y were synthesized through Chemical method.•The third-order NLO properties of the nanostructures were studied using the closed and open aperture z-scan technique.•The NLO behavior is attributed to saturable absorption (SA) and thermal nonlinear effects.•The transmittance valley in the open aperture increases with increase in the Y concentration.