Continuous wave laser probed thermal nonlinearity in TiO2 and TiO2-dye nano colloidal
| Autor: | P. Poornesh, S. Pramodini, L.S. Aravinda, K.K. Nagaraja |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
technology industry and agriculture Analytical chemistry Nanoparticle Nonlinear optics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Electronic Optical and Magnetic Materials Nano Continuous wave Z-scan technique Crystallite Electrical and Electronic Engineering Fourier transform infrared spectroscopy 0210 nano-technology Powder diffraction |
| Zdroj: | Optics & Laser Technology. 142:107182 |
| ISSN: | 0030-3992 |
| Popis: | Herein, we report on the nonlinear optical studies on the nano colloidal solutions of titanium dioxide (TiO2), TiO2-dye and acid blue dye in distilled water under continuous wave laser using the z-scan technique. The phase and structural properties of the sol–gel synthesized TiO2 nanoparticles at different temperatures were analyzed by x-ray powder diffraction (XRD) studies. The transmission electron microscopy (TEM) images confirmed that with an increase in calcination temperature, crystallite size increases. Further, the Fourier transform infrared (FTIR) spectra validate the synthesized TiO2 nano particle’s structure. The results from the z-scan reveal self-defocusing and reverse saturable absorption (RSA) behaviors of nano colloidal. The real and imaginary parts of third-order nonlinear optical susceptibility χ(3) were determined and estimated as 10−6 esu. Also, the optical limiting behavior of the samples is studied; a clamping of around ~ 4 mW is observed for the TiO2-dye nano colloidal. |
| Databáze: | OpenAIRE |
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