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<p>Sodium-zinc-aluminium-phosphate (NZAP) glasses doped with trivalent holmium were prepared using the traditional melt-quenching method and assessed their structural and luminescence characteristics. The nature (amorphous or crystalline), thermal stability, and elemental analysis of the glasses were examined with the help of X-ray diffraction (XRD), Thermogravimetric/Differential Thermal Analysis (TG/DTA), and Scanning Electron microscope (SEM) associated with energy dispersive spectrum (EDS), respectively. Fourier transform infrared spectroscopy (FTIR) was performed to unravel the vibrational features of the structural groups in the glasses. The optical absorption and photoluminescence spectra were recorded at room temperature and computed the radiative parameters, such as branching ratios (β<sub>R</sub>) and radiative lifetimes (τ<sub>R</sub>) and Judd–Ofelt (J–O) parameters. In addition, in each of the glass samples, for the observed significant glass samples, <sup>5</sup>S<sub>2</sub>, <sup>5</sup>F<sub>4</sub> → <sup>5</sup>I<sub>8</sub>, and <sup>5</sup>F<sub>5</sub> → <sup>5</sup>I<sub>8</sub>, stimulated emission cross-section (σ<sub>P</sub>), effective bandwidth (Δλ<sub>eff</sub>), and emission peaks position (λ<sub>P</sub>) were determined. The NZAP with 1&#xa0;mol% Ho<sup>3+</sup> glass matrix had the largest σ<sub>P</sub> of all the glass matrices, suggesting potential application for visible laser emission.</p>

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Sodium–Zinc–Aluminium–Phosphate (NZAP) glasses doped with Ho3+ ions: a study of structural and spectroscopic properties for emission applications

  • 期刊论文

  • 发表日期：

    2025年5月22日

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  • Rajesh Dagupati,
  • K. Brahmachary,
  • M. Dhamodhara Naidu,
  • Sharafudeen Kaniyarakkal

摘要

Sodium-zinc-aluminium-phosphate (NZAP) glasses doped with trivalent holmium were prepared using the traditional melt-quenching method and assessed their structural and luminescence characteristics. The nature (amorphous or crystalline), thermal stability, and elemental analysis of the glasses were examined with the help of X-ray diffraction (XRD), Thermogravimetric/Differential Thermal Analysis (TG/DTA), and Scanning Electron microscope (SEM) associated with energy dispersive spectrum (EDS), respectively. Fourier transform infrared spectroscopy (FTIR) was performed to unravel the vibrational features of the structural groups in the glasses. The optical absorption and photoluminescence spectra were recorded at room temperature and computed the radiative parameters, such as branching ratios (βR) and radiative lifetimes (τR) and Judd–Ofelt (J–O) parameters. In addition, in each of the glass samples, for the observed significant glass samples, 5S2, 5F4 → 5I8, and 5F5 → 5I8, stimulated emission cross-section (σP), effective bandwidth (Δλeff), and emission peaks position (λP) were determined. The NZAP with 1 mol% Ho3+ glass matrix had the largest σP of all the glass matrices, suggesting potential application for visible laser emission.