Structural and spectroscopic behavior of Er3+/Yb3+ co-doped boro-tellurite glasses

Optical, Physical and Structural Properties of Er3+ Doped Low‐Phonon Energy Vitreous Matrix: ZnO‐B2O3‐TeO2

“…Anti‐ symmetric stretching vibrations of BOB orthoborate groups with NBOs are observed at 1350 cm −1 . Similarly, a broad hump centered at 1300 cm −1 and a clear shoulder observed at 1237 cm −1 become prominent for high content of Er 3+ .…”

“…The unnormalized absorption spectra of the present glass samples doped with Er 3+ are shown in Figure and that of base glass (0 mol.% Er 2 O 3 ) in inset Figure (a). The spectra observed show characteristic peaks at 450, 488, 522, 543, 653, 797, 978, and 1526 nm, which correspond to 4f‐4f transitions of Er 3+ ions from ground state 4 I 15/2 to the excited states 4 F 5/2 , 4 F 7/2 , 2 H 11/2 , 4 S 3/2 , 4 F 9/2 , 4 I 9/2 , 4 I 11/2 , and 4 I 13/2 respectively . The absorption band positions and corresponding transitions are summarized in Table .…”

“…The optical band gap for direct and indirect transitions (Figure and5) was determined by plotting Tauc's Plot between (αhυ) 1/n as a function of photon energy (hυ). Gap values were calculated by extrapolating the linear region of the curve to (hυ) 1/n = 0 and are given in Table . A decrease of direct band gap from 3.40 to 2.34 eV and of indirect band gap from 3.32 to 2.79 eV was observed with the increase in the concentration of Er 2 O 3 respectively (Figure ).…”

The 1.85 μm spectroscopic properties of Er 3+ /Tm 3+ co-doped tellurite glasses containing silver nanoparticles

“…ACCEPTED MANUSCRIPTglass host and are strongly influenced by the vibrational levels associated with the central rare-earth ions bounded to the ligand atoms[18,31,47]. In the present tellurite glasses, parameter 2 Ω increases slightly with the increase of Ag NPs content, indicating the increased covalency of the ions-ligand and decreased symmetry around the Tm 3+ ions.…”

Physical and Structural Properties of Neodymium Doped Lithium Boro-Tellurite Glasses

“…Rare earth doped glass has achieved a great deal of interest for the sake of glass potential. Research on the usage of rare earth doped glass as sensor, medical application, and optical data storage have been increasing for the past few years [1]. One of the famous rare earths used for doping is Neodymium (Nd 3+ ) and one of the famous usages of rare earth material in the glass is by acting as glass coloring agents.…”