Fabrication, photoluminescence and terahertz absorption properties of Yb:YAG transparent ceramics with various Yb dopant concentrations

Chen, Xingtao; Wu, Yiquan; Wei, Nian; Lù, Zhongwen; Hua, Tao; Zeng, Qiang; Guo, Wang; Qi, Jianqi; Lu, Tiecheng

doi:10.1016/j.optmat.2018.08.049

Cited by 10 publications

(8 citation statements)

References 23 publications

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“…By adding transition metals or lanthanides (in this case, Ce +3 ), energy states are added within the band gap allowing electron transition in the visible range, and accordingly coloring the ceramic. Some dopants give a different color depending on their valence within the ceramic, for example, Yb is turquoise or colorless in YAG for Yb +2 or Yb +3 , respectively . Another way ceramics can be colored is by the presence of impurities or defects to which an electron or hole is locally bound (e. g. vacancies), known as color centers (or F‐centers) .…”

Section: Resultsmentioning

confidence: 99%

“…An example of this phenomenon is demonstrated in Yb : YAG (Figure a) and Eu : YAG (Figure b). After SPS, Yb (and Eu) ions in YAG host have a valence of Yb +2 (and Eu +2 ), this can be identified both by the turquoise (or dark purple‐blue) color of the sample (Figure inserts) and by the broad absorption bands seen in the in‐line transmittance spectra . In order to get the intended Yb +3 valence (which results in a colorless sample), the sample was annealed at 1000°C for 6 h in an air furnace.…”

Section: Resultsmentioning

confidence: 99%

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Photoluminescence of Doped YAG Transparent Ceramics Fabricated by Spark Plasma Sintering

Wagner

Ratzker

Kalabukhov

et al. 2019

Israel Journal of Chemistry

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Doped transparent ceramics have potential for a wide range of optical applications derived from their easily controllable fluorescence properties. The aim of this contribution is to present and discuss an effective fabrication method for doped transparent yttrium aluminum garnet ceramics. The powder synthesis route was adapted from common co‐precipitation methods and the powder densification was performed by spark plasma sintering. Parameters of the fabrication process were optimized for different lanthanide dopants in order to obtain highly transparent single‐ and multi‐doped ceramics. The photoluminescence properties of the samples were measured and discussed. The use of lithium fluoride as a sintering additive was confirmed to be favorable and post‐sintering heat treatments were shown to be necessary for certain dopants. Finally, the photoluminescence lifetime of dopants in a multi‐doped sample were measured and the energy transfer efficiency between dopants was determined.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Photoluminescence of Doped YAG Transparent Ceramics Fabricated by Spark Plasma Sintering

Wagner

Ratzker

Kalabukhov

et al. 2019

Israel Journal of Chemistry

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“…The optical transmittances of the mirror‐polished ceramics samples were measured using a UV/Vis/NIR spectrophotometer (Lambda‐750, Perkin‐Elmer). Measurements of optical coefficient were achieved by means of a scatterometer experimental setup, equipped with an integrating sphere and 1064 nm laser source, in a measurement configuration highly similar to that reported by the research group . All measurements were performed at room temperature.…”

Section: Methodsmentioning

confidence: 99%

“…Measurements of optical coefficient were achieved by means of a scatterometer experimental setup, equipped with an integrating sphere and 1064 nm laser source, in a measurement configuration highly similar to that reported by the research group. 28 All measurements were performed at room temperature. Figure 1 shows the XRD patterns, SEM and TEM analyses of the lab-synthesized Yb:YAG precursor powders calcined at temperatures ranging from room temperature to 1200°C for 4 hours.…”

Section: Methodsmentioning

confidence: 99%

Fabrication and microstructure development of Yb:YAG transparent ceramics from co‐precipitated powders without additives

Chen

Wei

et al. 2019

J Am Ceram Soc

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Sintering additives are generally considered to be important for improving densification in fabrication of transparent ceramics. However, the sintering aids as impurities doped in the laser materials would decrease the laser output power and produce additional heat during laser operation. In this work, Yb:YAG ceramics were vacuum‐sintered without additives at different temperatures for various soaking time through using ball‐milled powders synthesized by co‐precipitation route. The densification behavior and grain growth kinetics of Yb:YAG ceramics were systematically investigated through densification curves and microstructural characterizations. It was determined that the densification in the 1500°C‐1600°C temperature range was controlled by a grain‐boundary diffusion. It is revealed that the volume diffusion is the main mechanism controlling the grain growth between 1600°C and 1750°C. Although SiO2 additives can promote densification during low‐temperature sintering, the optical transmittance of Yb:YAG ceramic with no additives, sintered at 1800°C for 15 hours, reaches a maximum of 83.4% at 1064 nm, very close to the measured transmittance value of Yb:YAG single crystal. The optical attenuation loss was measured at 1064 nm in Yb:YAG transparent ceramic, to be 0.0035 cm−1, a value close to that observed for single crystals.

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“…3 приведены значения времени жизни люминесценции τ в порошках Yb:YAG. Полученные величины существенно превосходят значения τ , полученные в [1,7,31] для образцов лазерной керамики Yb:YAG с различным содержанием Yb, и достигают величин τ , приведенных в [32].…”

Section: экспериментальные результаты и обсуждениеunclassified

Полимерно-солевой синтез нанопорошков Yb:YAG и исследование их структуры и люминесцентных свойств

Булыга¹,

Евстропьев²,

Кузьменко³

et al. 2021

Оптика И Спектроскопия

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Experimental results of polymer-salt synthesis of Yb:YAG nanopowders and analysis of their structure and luminescent properties are presented. Infrared absorption spectra of synthesized materials are presented. The results of XRD analysis show that Yb:YAG nanocrystals with sizes of 18-35 nm form at a temperature of 900-1100 °С. The study on photoluminescence spectra and decay curves shows that properties of synthesized powders are close to properties of macroscopic materials produced by traditional high-temperature methods.

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Fabrication, photoluminescence and terahertz absorption properties of Yb:YAG transparent ceramics with various Yb dopant concentrations

Cited by 10 publications

References 23 publications

Photoluminescence of Doped YAG Transparent Ceramics Fabricated by Spark Plasma Sintering

Photoluminescence of Doped YAG Transparent Ceramics Fabricated by Spark Plasma Sintering

Fabrication and microstructure development of Yb:YAG transparent ceramics from co‐precipitated powders without additives

Полимерно-солевой синтез нанопорошков Yb:YAG и исследование их структуры и люминесцентных свойств

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