Journal
CERAMICS INTERNATIONAL
Volume 47, Issue 12, Pages 16801-16808Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.02.253
Keywords
Glasses; Thermal reducing agent; Europium ions; Silver nanoparticles; Non-linear optical; Optical limiting
Categories
Funding
- Taif University Researchers Supporting Project, Taif University, Taif, Saudi Arabia [TURSP-2020/226]
- DRDO, India
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Eu3+-activated glasses doped with Ag0 nanoparticles were fabricated using the melt quench method. The presence of Ag0 nanoparticles was confirmed by surface plasmon resonance peaks and transmission electron microscopy. Non-linear optical properties increased with AgNO3 concentration up to 0.6 mol %, before decreasing at higher concentrations.
Tri-positive lanthanide ion (Eu3+) activated glasses doped with different concentrations of silver (Ag0) nanoparticles obtained using thermal reducing agent were fabricated by applying the method of melt quench. The formation of Ag0 nanoparticles in glasses was revealed by the surface plasmon resonance (SPR) peak in the absorption spectra. Transmission electron microscopic measurements confirmed the presence of spherically shaped Ag0 nanoparticles of different size distribution. The absorption spectra showed a red-shift of the SPR peak with an increase in AgNO3 concentration occurring through Ostwald's ripening process because of the growth of particle size (as evidenced from microscope images). The non-linear optical (NLO) and optical limiting measurements were performed in the near infrared spectral region and femtosecond pulse excitation. The non-linear parameters were found to increase as the AgNO3 concentration increased to 0.6 mol %, however, the parameters subsequently decreased at higher doping level. The optical limiting threshold values demonstrated a reverse trend. The increase in non-linear optical properties regarding Ag nanoparticles concentration attributed to the enhancement of polarizabilities of glasses that occurred through local field stimulated by SPR of Ag nanoparticles when exposed to laser radiation of high energy. The increase in NLO coefficients (particularly the non-linear absorption coefficient) and the decrease in optical limiting threshold values with AgNO3 concentration (up to 0.6 mol %) indicated that these glasses containing 0.6 mol % AgNO3 are useful for the construction of the power optical limiters that function at the infrared region in the femtosecond pulse regime.
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