Third order nonlinear optical properties of Mn doped CeO2 nanostructures

• Published in: Optics and laser technology Vol. 101; pp. 358 - 362
• Main Authors: Mani Rahulan, K., Angeline Little Flower, N., Annie Sujatha, R., Mohana Priya, P., Gopalakrishnan, C.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-05-2018
• Subjects: Hydrothermal method; Nanoparticles; Optical limiting; Z-scan; Nanoparticles; Optical limiting; Hydrothermal method; Z-scan
• ISSN: 0030-3992; 1879-2545
• DOI: 10.1016/j.optlastec.2017.11.041

•Mn doped CeO2 nanostructures was synthesized through hydrothermal method.•The optical limiting property of the nanostructures was studied by a z-scan technique.•Nonlinear optical studies confirm 2 PA is responsible for optical limiting at 532 nm in ns regime.•The depth of the valley in the z-scan curve increases with increase in the Mn concentration.
Mn doped CeO2 nanoparticles with different ratios of Mn were synthesized by hydrothermal method and their structural properties were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM). XRD patterns revealed that the peaks are highly crystalline structure with no segregation of Mn. The surface morphology from SEM reveals that particle size decreases with increase in Mn concentration. Nonlinear optical studies of the samples were measured by single-beam open aperture Z-scan technique using 5 ns laser pulses at 532 nm. The measured optical nonlinearity of all the samples exhibit typical third order nonlinear optical behavior including two-photon absorption (2 PA) and reverse saturable absorption (RSA). The experimental results show that the presence of RSA in these nanoparticles makes them a promising material for the fabrication of optical limiting devices.
.