Concentration dependent spectroscopic behavior of Sm3+ doped leadfluoro-borophosphate glasses for laser and LED applications

Vijayakumar, M.; Marimuthu, K.; Sudarsan, V.

doi:10.1016/j.jallcom.2015.06.064

Cited by 77 publications

(12 citation statements)

References 42 publications

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“…These show that the 4 G 5/2 → 6 H 7/2 transition has the largest fluorescence branching ratio of 54.46%, which indicates a high possibility of red‐orange emission around 620 nm. The spectroscopic quality factor, χ = Ω 4 /Ω 6 , is the key parameter for determining the laser properties of the host material, and the calculated value of 0.85 for 0.75 mol% Sm 2 O 3 : YSZ is close to 1, and indicates that this is a candidate material for red‐orange laser output.…”

Section: Resultsmentioning

confidence: 93%

Preparation and optical properties of samaria‐doped yttria‐stabilized zirconia single crystals

Tan

Wang

et al. 2019

J Am Ceram Soc

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Single crystals of yttria‐stabilized zirconia (YSZ) doped with various concentrations of Sm2O3 were synthesized by the optical floating zone method, and their structure and spectroscopic properties characterized using powder X‐ray diffraction (XRD), optical absorption, and luminescence measurements. XRD showed that the cubic phase of ZrO2 was stabilized by addition of Y2O3 and a series of absorption peaks characteristic of Sm3+ was detected by UV‐visible absorption spectroscopy. Three phenomenological J‐O oscillator strength parameters Ωt (t = 2, 4, 6) were calculated to evaluate the local structure and bonding in the vicinity of the Sm3+ for the 0.75 mol% Sm2O3: YSZ sample. These were in order of Ω2 < Ω4 < Ω6 with values of Ω2 = 5.46 × 10−20 cm2, Ω4 = 10.70 × 10−20 cm2, and Ω6 = 12.67 × 10−20 cm2, and indicate a relatively high symmetry and low covalent character for the Sm‐O bond at the Sm3+ sites in the YSZ matrix. Photoluminescence spectra recorded under an excitation of 404 nm showed four emission bands centered at 571 nm, 621 nm, 652 nm, and 716 nm corresponding to the transitions 4G5/2→6Hj (j = 5/2, 7/2, 9/2, 11/2). The transition probability, lifetime, and branching ratio obtained from the emission spectrum of the 0.75 mol% Sm2O3: YSZ crystal showed that YSZ is a potential host for Sm3+ to achieve a reddish‐orange laser output, and the Sm3+‐modified YSZ crystals have a possible use in reddish‐orange laser and lighting devices.

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Section: Resultsmentioning

confidence: 93%

Preparation and optical properties of samaria‐doped yttria‐stabilized zirconia single crystals

Tan

Wang

et al. 2019

J Am Ceram Soc

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“…The slight increase in Ω 2 when x increases confirms that the addition of Ag 2 O leads to minor changes in the Er 3+ site: slightly less ionic Er 3+ -ligand bonds, lower symmetry around the Er 3+ ions, and more polarized sites of the Er 3+ according to [34]. The Ω 4 and Ω 6 parameters are related to the long-range effect of the glass host such as the rigidity, density, and other dielectric properties of the media [35,36]. The slight decrease of these parameters as x increases is probably associated with a decrease in the glass network rigidity, in agreement with structural analysis.…”

Section: Resultsmentioning

confidence: 94%

Impact of Ag2O Content on the Optical and Spectroscopic Properties of Fluoro-Phosphate Glasses

et al. 2019

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Glasses with the system (84.60-x) NaPO3-5 ZnO-(9.40-x) NaF-x Ag2O-1 Er2O3, (x = 0, 2, 4, and 6) (mol%) were synthesized by the conventional melt-quenching method. The impact of the addition of Ag2O on the physical, thermal, structural, and optical properties of the glasses is discussed. The Judd-Oflet analysis was used to evaluate the radiative properties of the emission transitions of the glasses. The enhancement of luminescence properties due to Ag2O is discussed in terms of consequent changes in the local electromagnetic field, symmetry, and the ligand field around the Er3+ ion. The heat treatment of the glass was performed in order to precipitate Ag nanoparticles (NPs), which form as a layer at the surface of the heat-treated glasses as confirmed using scanning electron microscopy (SEM). The Ag NPs were found to increase the intensity of the emission at 1.5 µm.

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“…On the other hand, a weak feature is observed at ~540 cm -1 which belongs to the B-O-B vibrations and/or borate ring deformations [2,51,52]. Below 500 cm -1 a band of Li ionic vibration is observed [1][2][3]53]. Finally, samples containing higher Cr concentration (e.g., x = 0.3, 0.5 mol%), exhibit weak feature at ~ 470cm -1 which belongs to vibrations of Cr 6+ in Cr4 2− structural units [1,2,27,54].These fine features are easily seen in the zoom-in and deconvoluted spectra presented in Fig.…”

Section: Ftir Resultsmentioning

confidence: 99%

Optical transitions from hexavalent chromium in lithium-borate glasses

et al. 2021

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The melt-quenching technique was used to prepare a series of chromium-doped borate glasses with the composition xCr2O3 -(70-x) B2O3-30 Li2O-(x = 0, 0.1, 0.2, 0.3 and 0.5 mol %). The low-doping level here employed allowed to unambiguously identify welldefined near-edge Cr 6+ optical transitions, and to precisely determine the optical band gap of the borate glass host. Additional Cr 3+ transitions were observed in the visible regime, rendering a strong modulation of the glass color, from colorless to dark greenish, with Cr content. Both Cr 6+ (after the charge transfer transformation into Cr 5+ ) and Cr 3+ oxidation states and their variations with Cr doping were identified from electron spin resonance spectroscopy. All samples exhibit similar vibrational spectra dominated by BO3 and BO4 structural units, with the development of weak Cr 6+ vibration with Cr doping. The present study provides structurally similar but optically active and tunable glass hosts suitable for various optical applications.

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Concentration dependent spectroscopic behavior of Sm3+ doped leadfluoro-borophosphate glasses for laser and LED applications

Cited by 77 publications

References 42 publications

Preparation and optical properties of samaria‐doped yttria‐stabilized zirconia single crystals

Preparation and optical properties of samaria‐doped yttria‐stabilized zirconia single crystals

Impact of Ag2O Content on the Optical and Spectroscopic Properties of Fluoro-Phosphate Glasses

Optical transitions from hexavalent chromium in lithium-borate glasses

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