Spectroscopy of the Er-doped lithium tetraborate glasses

Padlyak, B.V.; Lisiecki, Radosław; Ryba‐Romanowski, W.

doi:10.1016/j.optmat.2016.02.025

Cited by 33 publications

(4 citation statements)

References 49 publications

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“…The sharp signal at ~1587 G, corresponding to a g = 4.27±0.01, is associated with Fe 3+ impurities due to SiO 2 precursor . This signal is also observed in other glass and GC samples prepared by other authors . The other resonance at ~3263 G is related to the background and to the g‐line of Fe 3+ impurities.…”

Section: Resultssupporting

confidence: 91%

Effect of dopant precursors on the optical properties of rare‐earths doped oxyfluoride glass‐ceramics

et al. 2019

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The crystallization of fluoride nanocrystals (NCs) in chemically and mechanically stable aluminosilicate glasses has shown interesting optical properties even for small crystal fractions (10‐15 wt%). When rare‐earth (RE) ions are used as dopants, crystal‐like features can be reproduced and an increase in the emission and/or energy transfer processes, with respect to the starting glasses, is observed. A crucial point for these materials is the study of the local surrounding of RE ions and their incorporation in the NCs. In fact, the effective concentration in the NCs can be much higher than the nominal concentration, up to one order of magnitude or even higher. The knowledge of RE ions incorporation in the NCs permits choosing proper doping levels to optimize both linear and nonlinear optical properties. In this work, transparent oxyfluoride glass‐ceramics with LaF3 NCs, doped with Nd3+ and Er3+ using oxide and fluoride precursors, were prepared using the melt‐quenching method and controlled crystallization. The local surrounding of the RE ions was studied using X‐ray absorption spectroscopy, electron paramagnetic resonance and photoluminiscence. The results show that most RE ions are already in a fluorine‐rich amorphous environment even in the initial glass. The crystallization process provokes the RE ion redistribution and incorporation in the fluoride NCs. The different RE precursors, used as oxides or fluorides, have an influence on the incorporation of the RE in the NCs and, as a consequence, on the final optical properties.

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Section: Resultssupporting

confidence: 91%

Effect of dopant precursors on the optical properties of rare‐earths doped oxyfluoride glass‐ceramics

et al. 2019

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“…If the particles are sufficiently small, structure disorder effects may also produce broadening in the spectral features, which has been demonstrated in CaF2:Er 3+ [32] and CeO2:Er 3+ [33] nanocrystalline systems. A tentative simulation of the effect is given as the second curve in [37][38][39][40][41][42]. Spectra feature assignment to erbium is usually based on the low temperature requirement for the detection of the signal.…”

Section: Direct Epr Detectionmentioning

confidence: 99%

“…Spectra feature assignment to erbium is usually based on the low temperature requirement for the detection of the signal. Alternatively, evidence for EPR signal association with Er 3+ can be obtained from sample investigations with different levels of Er content [40,42]. For high levels of Er doping formation of Er-Er ion pairs can be expected, however literature data for the g values of such features are not unambiguous [41,42].…”

Section: Direct Epr Detectionmentioning

confidence: 99%

EPR characterization of erbium in glasses and glass ceramics

Antuzevičš

2020

Low Temperature Physics

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Electron paramagnetic resonance (EPR) is a well-established spectroscopic technique for electronic structure characterization of rare-earth ion impurities in crystalline and amorphous hosts. EPR spectra of erbium-doped glass matrices and nanocomposites can provide information about local structure variations induced by changes in chemical composition or crystallization processes. Characterization possibilities of Er3+ ions in glasses and glass ceramics including direct EPR measurements, indirect investigations via secondary paramagnetic probes, and optically detected magnetic resonance techniques are considered in this article.

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“…2(a,b). In addition, the fluorescent lifetimes (τ exp-avg ) of G ZBL -Er and C ZBL -Er are up to be 461.9 and 558.5 μs, respectively, which far exceed to 58 μs in Li 2 B 4 O 7 glass 62 , 26 μs in SrF 2 nanocrystals 63 , 333 μs in NaYF 4 64 and are close to 490 μs in oxyfluoride tellurite 65 , indicating that the low phonon-energy material contributes to photon releasing effectively.…”

Section: Discussionmentioning

confidence: 96%

Anti-escaping of incident laser in rare-earth doped fluoride ceramics with glass forming layer

Shi

Lin

Yang

et al. 2019

Sci Rep

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Adaptive fluoride ceramic with glass forming layer (GCZBL-Er) used in laser anti-escaping has been prepared by one-step synthesis, and the thickness of glass layer is identified as ~0.41 mm. Blue, green and red emissions of Er3+/Yb3+ codoped fluoride ceramic (CZBL-Er) and glass layer (GZBL-Er) have been investigated under ~980 nm laser pumping. With the forming of thin glass layer on ceramic surface, the absorption intensities on diffuse reflection of GCZBL-Er at 974 nm and 1.53 μm increase by 48% and 53% than those of CZBL-Er. Excited by a 979 nm laser, the presence of the glass layer increases the absolute absorption rate in spectral power from 75% in CZBL-Er to 83% in GCZBL-Er, which is consistent with the improvement in the absorbed photon number. In addition, the quantum yield of GCZBL-Er complex is raised by 28.4% compared to the case of ceramic substrate by photon quantification. Intense absorption-conversion ability and efficient macroscopical anti-escaping effect confirm the superiority of ingenious structure in the fluoride ceramics with glass forming layer, which provides a new approach for developing the absorption-conversion materials of anti-NIR laser detection.

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Spectroscopy of the Er-doped lithium tetraborate glasses

Cited by 33 publications

References 49 publications

Effect of dopant precursors on the optical properties of rare‐earths doped oxyfluoride glass‐ceramics

Effect of dopant precursors on the optical properties of rare‐earths doped oxyfluoride glass‐ceramics

EPR characterization of erbium in glasses and glass ceramics

Anti-escaping of incident laser in rare-earth doped fluoride ceramics with glass forming layer

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