Infrared to visible upconversion emission in Nb2O5 modified tellurite glasses triply doped with rare earth ions

In this communication, we report physical and thermal properties along with Raman spectroscopic investigations on Zinc Niobo Tellurite glass systems doped with Eu2O3 and Dy2O3 at the expense of TeO2. The glasses have been synthesized by the melt quenching technique. Physical parameters like density, molar volume, packing density were estimated. The density of the un-doped glasses increases with increasing mol% of the modifier (ZnO) whereas the glass transition temperature (Tg) decreases. We have observed an increase in the density of the base glass systems which are doped with rare earth (RE) dopants. The packing density of the un-doped glasses remains almost constant with increasing modifier content suggesting that there is not much change in the local environment. Raman spectra were recorded at room temperature and assigned to TeO4 and TeO3 structural units in these glasses. The peak shift, full width at half maximum (FWHM) of the de-convoluted Raman peaks were analyzed to get information about the local environment. It is observed that these compositions of tellurite glasses are good host materials for rare earth ions as they offer voids in the network. Further, it was observed that the rare earth ion doping has not affected the local environment of the glasses; Dy3+ ions have a slightly higher tendency to polarize Te-O bonds than the Eu3+ ions. Keywords: Niobium-based tellurite glasses, XRD, DSC, FTIR.

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Structural, thermal, optical and photo-luminescent properties of barium tellurite glasses doped with rare-earth ions

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2017.09.025 ◽

2017 ◽

Vol 476 ◽

pp. 67-74 ◽

Cited By ~ 32

Author(s):

Amarjot Kaur ◽

Atul Khanna ◽

Lyubomir I. Aleksandrov

Keyword(s):

Rare Earth ◽

Luminescent Properties ◽

Rare Earth Ions ◽

Tellurite Glasses ◽

Photo Luminescent

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Hexagonal β-Na(Y,Yb)F4 based core/shell nanorods: epitaxial growth, enhanced and tailored up-conversion emission

RSC Advances ◽

10.1039/c7ra00475c ◽

2017 ◽

Vol 7 (31) ◽

pp. 19205-19210 ◽

Cited By ~ 2

Author(s):

Jing Yan ◽

Honghu Yao ◽

Junhao Li ◽

Shiman He ◽

Qili Wu ◽

...

Keyword(s):

Rare Earth ◽

Epitaxial Growth ◽

Upconversion Emission ◽

Optically Active ◽

Rare Earth Ions ◽

Core Shell ◽

Growth Method ◽

One Step

Rare earth ions-doped hexagonal β-Na(Y,Yb)F4 nanorods can be coated perfectly with either optically active or inert shells to improve and/or tailor the upconversion emission through a one-step epitaxial growth method from α-phased nanoparticles.

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Study on Novel Structure of Glycolic and Oxalic Acid Holmium: [Ho (C3 H6O9)]·CH3OH

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.531-532.417 ◽

2012 ◽

Vol 531-532 ◽

pp. 417-420

Author(s):

Hai Xing Liu ◽

Wu Lan Zeng ◽

Jing Zhong Xiao ◽

Guang Zeng ◽

Hui Juan Yue ◽

...

Keyword(s):

Energy Transfer ◽

Rare Earth ◽

Hydrothermal Reaction ◽

Research Work ◽

Functional Materials ◽

Structural Diversity ◽

Upconversion Emission ◽

Rare Earth Ions ◽

Rare Earth Doping ◽

Novel Structure

In the study of functional materials, more attention is the construction of organic–inorganic hybrid materials with structural diversity, fascinating properties, and potential applications in catalysis, molecular adsorption, medicine, electro-conductivity, magnetism and photochemistry. At present, the research work in upconversion emission in rare-earth doping materials has been greatly increased. Yb3+ and Ho3+ upconversion energy transfer is attractive, because Yb3+ and Ho3+ upconversion energy transfer is relatively simple compared to upconversion involving other rare-earth ions. In this paper, a novel holmium complex [Ho (C3 H6O9)] •CH3OH has been synthesized from a hydrothermal reaction and the crystal structure has been determined by means of single-crystal X-ray diffraction. The Ho atom is coordinated by eight O atoms. The molecular is antisymmetric structure by the C2-C2 axis. The molecular structure stabilized by the O-H…O hydrogen-bonding interactions.

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Multi-Rare-Earth Ions Codoped Tellurite Glasses for Potential Dual Wavelength Fibre-Optic Amplifiers

Chinese Physics Letters ◽

10.1088/0256-307x/20/1/339 ◽

2002 ◽

Vol 20 (1) ◽

pp. 130-132 ◽

Cited By ~ 19

Author(s):

Dai Shi-Xun ◽

Yang Jian-Hu ◽

Xu Shi-Qing ◽

Dai Neng-Li ◽

Wen Lei ◽

...

Keyword(s):

Rare Earth ◽

Rare Earth Ions ◽

Dual Wavelength ◽

Tellurite Glasses ◽

Fibre Optic

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The Effect of Nd3+ Composition on Judd-Ofelt Analysis of Lithium Niobate Tellurite Glasses Codoped with Er3+

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.268.191 ◽

2017 ◽

Vol 268 ◽

pp. 191-197 ◽

Cited By ~ 1

Author(s):

Nurhafizah Hasim ◽

Md Supar Rohani

Keyword(s):

Rare Earth ◽

Glass Network ◽

Rare Earth Ions ◽

Oscillator Strengths ◽

Tellurite Glasses ◽

Melt Quenching ◽

Intensity Parameters ◽

Doped Glasses ◽

Rare Earth Doped ◽

Covalent Nature

The modification of absorption characteristics in rare-earth doped tellurite glasses is important in photonics application. The Er3+/Nd3+ doped glasses of the form (69-x)TeO2–15Li2CO3–15Nb2O5–1Er2O3 -(x)Nd2O3 with x =0.2 and 0.6 mol% are successfully made by using conventional melt-quenching technique. The Judd-Ofelt analysis is to determine the local structure and bonding in the vicinity of rare-earth ions. The oscillator strengths are calculated from the absorption spectra and used to evaluate Judd-Ofelt intensity parameters (Ωλ, λ=2, 4 and 6). The values of Ω4 and Ω6 change with the increase of Nd3+ concentration is ascribed to the change in glass network structures. The values of Ω2 are increased from 1.53 to 37.13 (10-22) cm2 with the increase of Nd3+ concentration which indicate an increase in the covalent nature of Nd-O bond and less centrosymmetrical the ion sites. The decrease in τrad for each level with the increase of Nd3+ concentration signifies on how fast a particular level gets depopulated. The values of β for the transitions 4G5/2, 2G7/2 → 4I9/2, 2H11/2 → 4I9/2 and 4F9/2 → 4I9/2 are found to lie in between 99.6 to 100.0%.

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Enhanced Optical Properties of Germanate and Tellurite Glasses Containing Metal or Semiconductor Nanoparticles

The Scientific World JOURNAL ◽

10.1155/2013/385193 ◽

2013 ◽

Vol 2013 ◽

pp. 1-13 ◽

Cited By ~ 16

Author(s):

Cid Bartolomeu de Araujo ◽

Diego Silvério da Silva ◽

Thiago Alexandre Alves de Assumpção ◽

Luciana Reyes Pires Kassab ◽

Davinson Mariano da Silva

Keyword(s):

Optical Properties ◽

Energy Transfer ◽

Rare Earth ◽

Semiconductor Nanoparticles ◽

Rare Earth Ions ◽

Tellurite Glasses ◽

All Optical ◽

Gold Nps ◽

Anti Stokes ◽

The Rare Earth

Germanium- and tellurium-based glasses have been largely studied due to their recognized potential for photonics. In this paper, we review our recent studies that include the investigation of the Stokes and anti-Stokes photoluminescence (PL) in different glass systems containing metallic and semiconductor nanoparticles (NPs). In the case of the samples with metallic NPs, the enhanced PL was attributed to the increased local field on the rare-earth ions located in the proximity of the NPs and/or the energy transfer from the metallic NPs to the rare-earth ions. For the glasses containing silicon NPs, the PL enhancement was mainly due to the energy transfer from the NPs to the Er3+ions. The nonlinear (NL) optical properties of PbO-GeO2films containing gold NPs were also investigated. The experiments in the pico- and subpicosecond regimes revealed enhanced values of the NL refractive indices and large NL absorption coefficients in comparison with the films without gold NPs. The reported experiments demonstrate that germanate and tellurite glasses, having appropriate rare-earth ions doping and NPs concentration, are strong candidates for PL-based devices, all-optical switches, and optical limiting.

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