Patra, Pritha and Jagannath, Gangareddy and Soma, Venugopal Rao and Biswas, Kaushik and K., Annapurna (2024) Effect of Nd2O3 concentration on crystallization mechanism and third-order optical nonlinearity of lanthanide-titanium-tellurite glass and glass-ceramics. Crystal Growth & Design, 24 (12). ISSN 1528-7483
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Rare-earth (RE) doped transparent tellurite glass-ceramics (GCs) embedded with “anti-glass” crystallites not only exhibit superior emission properties, can also be a potential medium for nonlinear optical (NLO) applications. Both of these properties depend on their transparency. Keeping this in view, we aimed to elucidate the effect of Nd3+ion concentration(0.5-2 mol%) on crystallization mechanism of lanthanum-gadolinium-titanium-tellurite (LGTT) glass in retaining the transparency, and NLO properties.XRD reveals the precipitation of (La/Nd)2T6O15 and Gd2Te6O15“anti-glass” crystallites upon ceramization of these glasses.Particle size-dependent DSC confirms competition between the growth of these two crystalline phasesat higher Nd3+ concentration that aids in controlling crystal growth.The FE-SEM microstructures demonstrate a change in morphology of the crystallites from rectangular (1.5 μm) to spherical (120 nm) with increasing Nd2O3 concentration from 0.5→2 mol% and thereby retaining optical transparency (12%→55%) in GCs. Photoluminescence spectra reveal maximum emissionintensity for 1 mol% of Nd2O3 doped glass, however, lifetime is maximum (156 μs) for 0.5 % Nd2O3 doping. This study also discloses an enhancement of third-order NLO properties as a function of Nd2O3 concentration in LGTT glasses under femtosecond laser excitation at 800-1200 nmdue to resonant nonlinearity. Emission intensity and NLO responses is increased in the GCs compared to their parent glasses.Maximum nonlinearabsorption coefficient (α2) of 4.986×10-10 m/W and nonlinear refractive index (n2) of 3.115× 10-17 m2/W has been obtained from LGTT-Nd2(GC-36h) GCs at 800 nm. GCsexhibit an optical limiting threshold of 4.14 mJ/cm2 suggesting its great potential for intense radiation shielding.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | anti-glass, Tellurite glass-ceramics, Nd3+ emission, Third order nonlinearity |
| Subjects: | Glass |
| Divisions: | Glass |
| Depositing User: | Ms Upasana Sahu |
| Date Deposited: | 01 Sep 2025 10:31 |
| Last Modified: | 01 Sep 2025 10:31 |
| URI: | http://cgcri.csircentral.net/id/eprint/5682 |
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