Spectral and third order nonlinear optical properties of Yttrium-doped BaWO4 nanostructures
Abstract
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.
- Publication:
-
Optical Materials
- Pub Date:
- February 2019
- DOI:
- 10.1016/j.optmat.2018.12.014
- Bibcode:
- 2019OptMa..88..466M
- Keywords:
-
- Saturable absorption;
- Yttrium;
- Z-scan;
- Nanostructures