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Filho, A. G. Souza; Freire, Paulo; Guedes, I.; Melo, F. E. A.; Fílho, J. Mendes; Custódio, Maria Cláudia Cerchiari; Lebullenger, Ronan; Hernandes, Antônio Carlos

doi:10.1023/a:1006655632032

Cited by 28 publications

(5 citation statements)

References 10 publications

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“…2 shows the effect of pressure on peak positions of 5 D 0 → 7 F 0,1,2 transitions of 0.05, 2.0 and 6.0 mol% Eu 2 O 3 -doped glasses. The data points show the experimental data which are fitted to a linear equation to find the shift per GPa (with P in GPa) as [24,25]:…”

Section: Resultsmentioning

confidence: 99%

Effect of high pressure on photoluminescence properties of Eu3+: K–Ba–Al–fluorophosphate glasses

Basavapoornima

Jyothi

Venkatramu

et al. 2011

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 99%

Effect of high pressure on photoluminescence properties of Eu3+: K–Ba–Al–fluorophosphate glasses

Basavapoornima

Jyothi

Venkatramu

et al. 2011

Journal of Alloys and Compounds

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“…On the other hand, 4 and 6 values depend on the bulk properties such as viscosity and dielectric of the media and are also affected by the vibronic transitions of the RE ions bound to the ligand atoms [25]. The tendency of the J-O parameters in the Sm 3+ doped LGT glass is found to be in the order are compared with the values of Sm 3+ ions in different hosts [26][27][28][29][30][31] presented in table 3.…”

Section: Determination Of the J-o Parameters J-o Theorymentioning

confidence: 99%

“…The large stimulated emission cross-sections are the attractive features for low-threshold, high gain laser applications, which are utilized to obtain CW laser action [33]. Three emission levels in Sm 3+ : LGT10 glass corresponding to 4 than fluoroborate glass (L5FBS) [20], tellurite glasses [26], PbO-PbF 2 -B 2 O 3 [34] and fluorophosphate glasses [35]. The branching ratios of three emissions 4 G 5/2 → 6 H 9/2 , 4 G 5/2 → 6 H 7/2 and 4 G 5/2 → 6 H 5/2 transitions were found to be nearly 29%, 54% and 16%, respectively.…”

Section: Fluorescence Spectramentioning

confidence: 99%

Spectroscopic properties and Judd–Ofelt analysis of Sm³⁺doped lead–germanate–tellurite glasses

Jayasimhadri¹,

Cho²,

Jang³

et al. 2008

J. Phys. D: Appl. Phys.

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Spectroscopic properties of Sm3+ (1 mol%) ions in 49 PbO–30 GeO2–20 TeO2 glass have been characterized through optical absorption and temperature dependent fluorescence. The spectroscopic parameters such as oscillator strengths (f), Judd–Ofelt (J–O) intensity parameters (Ωλ), spontaneous emission probability (AR), branching ratios (βR) and radiative lifetimes (τR) of various excited levels have been determined from the absorption spectrum by using J–O analysis. From the fluorescence spectra, four emission transitions have been observed from the 4 G5/2 state to the lower lying states 6H5/2, 6H7/2, 6H9/2 and 6H11/2 upon exciting the sample with a 488 nm line of an argon ion laser. The stimulated emission cross-sections (σe) and branching ratios (βmeas) were estimated from the emission spectra for all emission transitions and decay curve analysis for the 4G5/2 level has also been carried out for different concentrations. Based on these results, the utility of Sm3+ doped lead–germanate–tellurite glasses as laser active materials in the visible region is discussed.

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“…The energy positions of these emission bands are taken at the peak maxima of the bands for 5 D 0 → 7 F 0 and 7 F 2 transitions and a barycentre has been taken in the case of the 5 D 0 → 7 F 1 transition to avoid ambiguity in determining the peak maximum for this transition. As can be seen from figure 3, the pressure dependent energy level shift can be expressed quite well as a linear function [26,27]:…”

Section: Resultsmentioning

confidence: 87%

Photoluminescence from the⁵D₀level of Eu³⁺ions in a phosphate glass under pressure

Babu

Jayasankar

et al. 2006

J. Phys.: Condens. Matter

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The pressure dependence of the luminescence from [Formula: see text] transitions of Eu(3+) ions in 58.5P(2)O(5)-9Al(2)O(3)-14.5BaO-17K(2)O-1Eu(2)O(3) glass has been investigated up to 38.3 GPa at room temperature. The relative luminescence intensity ratio of [Formula: see text] to [Formula: see text] transitions of the Eu(3+) ions is found to decrease with increasing pressure, indicating a lowering of the asymmetry around the Eu(3+) ions with pressure. The [Formula: see text] transitions exhibit pressure-induced red shifts of different magnitude, which suggests a decrease in Slater parameters (F(k)) and in the spin-orbit coupling parameters (ζ) for the Eu(3+) ions. Stark components of the (7)F(1) level have been used to evaluate the crystal-field (CF) parameters B(20) and B(22), which are in turn used to estimate the CF strength experienced by the Eu(3+) ions in the glass. The observed increase in the CF strength parameter is found to have an almost cubic dependence on pressure. Luminescence decay curves for the [Formula: see text] transition are found to be single exponential over the entire pressure range studied. The lifetime did not change under pressure up to 5 GPa, although a significant change in the CF strength is noticed in this pressure range. The reduction of lifetime observed at pressures above 5 GPa could be partially due to an increase of pressure-induced defect centres. Such a process can then explain the hysteresis observed in the variation of lifetime and crystal-field strength on the release of pressure.

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Cited by 28 publications

References 10 publications

Effect of high pressure on photoluminescence properties of Eu3+: K–Ba–Al–fluorophosphate glasses

Effect of high pressure on photoluminescence properties of Eu3+: K–Ba–Al–fluorophosphate glasses

Spectroscopic properties and Judd–Ofelt analysis of Sm³⁺doped lead–germanate–tellurite glasses

Photoluminescence from the⁵D₀level of Eu³⁺ions in a phosphate glass under pressure

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Untitled

Cited by 28 publications

References 10 publications

Effect of high pressure on photoluminescence properties of Eu3+: K–Ba–Al–fluorophosphate glasses

Effect of high pressure on photoluminescence properties of Eu3+: K–Ba–Al–fluorophosphate glasses

Spectroscopic properties and Judd–Ofelt analysis of Sm3+doped lead–germanate–tellurite glasses

Photoluminescence from the5D0level of Eu3+ions in a phosphate glass under pressure

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Product

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Spectroscopic properties and Judd–Ofelt analysis of Sm³⁺doped lead–germanate–tellurite glasses

Photoluminescence from the⁵D₀level of Eu³⁺ions in a phosphate glass under pressure