The micro-pulling down (MPD) method is a high-efficiency crystal growth technique from melt, which has been invented by French scientist Ricard in 1975 [1] and developed by Japanese scientist Fukuda since 1992 [2] and...The micro-pulling down (MPD) method is a high-efficiency crystal growth technique from melt, which has been invented by French scientist Ricard in 1975 [1] and developed by Japanese scientist Fukuda since 1992 [2] and French scientist Lebbou in 2000s [3]. Appropriate configuration of a die at the crucible bottom and the proper selection of temperature gradient allow the crystal shape control during growth of crystals with the cross section of 0.1–10 mm without mechanical and thermal stresses [2]. MPD growth method is an economical and quick single crystal growth technique, which may be used for high throughput screening novel rare earth optical crystals [4,5].展开更多
A multidisciplinary approach for the production and characterization of a series of high concentration Er3+activated SrLaGa3 O7(abbreviated as Er:SLGO)crystal fibers is shown to have a great promise for implementation...A multidisciplinary approach for the production and characterization of a series of high concentration Er3+activated SrLaGa3 O7(abbreviated as Er:SLGO)crystal fibers is shown to have a great promise for implementation in mid-infrared laser applications.The current approach includes the design and formation of unique layered tetrahedral network structures with several kinds of rare earth(RE)ions including Er ions distributing statistically between layers,such as Er:SLGO,Er,Nd:SLGO,Er,Yb,Ho:SLGO,Er,Eu:SLGO and Er,Ho:SLGO.Five kinds of Er:SLGO crystal fibers were designed to grow via a micropulling down method.Spectroscopic analyses show that Er,Yb,Ho:SLGO and Nd,Er:SLGO crystal fibers were superiorly endowed with inhomogeneous broadening absorption and strong emission.The unique structural components design enables the generation of improved absorption and emission recombination,and the inhibition of self-termination as well.Generally,the use of structural components design may warrant high-efficiency emissions in RE-doped crystal fibers.展开更多
HfO2/a-A12O3 eutectics were grown by the micro-pulling down （μ-PD） method at the composition of 63.2 mol.% of-A1203, 35.512 mol.% HfO2, 0.92 mol.% Eu203 and 0.368 tool.% Y2O3. Rod phases with around 3-4 μm diamete...HfO2/a-A12O3 eutectics were grown by the micro-pulling down （μ-PD） method at the composition of 63.2 mol.% of-A1203, 35.512 mol.% HfO2, 0.92 mol.% Eu203 and 0.368 tool.% Y2O3. Rod phases with around 3-4 μm diameter were observed on the transverse cross-section. The phase-separated scintillator fibers （PSSFs） structure with fibers of around 3-4 μm diameter and 10-20 μm length was observed. The electron back scattering patterns indicated crystal orientation of [101] for monoclinic HfO2 rod phase and [0001] for μt-A1203 matrix in the transverse cross-section. Eu3＋ 4f-4f emission was observed at 550-750 nm.展开更多
基金supported by the National Key Research and Development Program of China(Grant No.2016YFB0701004)the Jilin Province Science and Technology Development Project(Grant No.20170101092JC)
文摘The micro-pulling down (MPD) method is a high-efficiency crystal growth technique from melt, which has been invented by French scientist Ricard in 1975 [1] and developed by Japanese scientist Fukuda since 1992 [2] and French scientist Lebbou in 2000s [3]. Appropriate configuration of a die at the crucible bottom and the proper selection of temperature gradient allow the crystal shape control during growth of crystals with the cross section of 0.1–10 mm without mechanical and thermal stresses [2]. MPD growth method is an economical and quick single crystal growth technique, which may be used for high throughput screening novel rare earth optical crystals [4,5].
基金Project supported by National Natural Science Foundation of China(51832007,51472240,51872286,61675204)Science and Technology Plan Leading Project of Fujian Province(2018H0046)+1 种基金State Key Laboratory of Rare Earth Resource Utilization(RERU2018004,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences)the National Key Research and Development Program of China(2016YFB0701002)。
文摘A multidisciplinary approach for the production and characterization of a series of high concentration Er3+activated SrLaGa3 O7(abbreviated as Er:SLGO)crystal fibers is shown to have a great promise for implementation in mid-infrared laser applications.The current approach includes the design and formation of unique layered tetrahedral network structures with several kinds of rare earth(RE)ions including Er ions distributing statistically between layers,such as Er:SLGO,Er,Nd:SLGO,Er,Yb,Ho:SLGO,Er,Eu:SLGO and Er,Ho:SLGO.Five kinds of Er:SLGO crystal fibers were designed to grow via a micropulling down method.Spectroscopic analyses show that Er,Yb,Ho:SLGO and Nd,Er:SLGO crystal fibers were superiorly endowed with inhomogeneous broadening absorption and strong emission.The unique structural components design enables the generation of improved absorption and emission recombination,and the inhibition of self-termination as well.Generally,the use of structural components design may warrant high-efficiency emissions in RE-doped crystal fibers.
基金Project supported by the Funding Program for Next Generation World-Leading Researchers,JSPS,Development of Systems and Technology for Advanced Measurement and Analysis,Japan Science and Technology Agency (JST),Adaptable & Seamless Technology Transfer Program through Target-driven R&D (A-STEP),JST,Japan Society for the Promotion of Science (JSPS) Grant-in-Aid for Exploratory Research,JSPS Research Fellowships for Young Scientists,the Health Labour Sciences Research Grant,the Ministry of Health Labour and Welfare and Czech MEYS KONTAKT Cz-jp Collaboration LH14266 Project,Crystal Clear Collaboration in CERN,and EC Marie Curie Initial Training Network LUMINET (316906)
文摘HfO2/a-A12O3 eutectics were grown by the micro-pulling down （μ-PD） method at the composition of 63.2 mol.% of-A1203, 35.512 mol.% HfO2, 0.92 mol.% Eu203 and 0.368 tool.% Y2O3. Rod phases with around 3-4 μm diameter were observed on the transverse cross-section. The phase-separated scintillator fibers （PSSFs） structure with fibers of around 3-4 μm diameter and 10-20 μm length was observed. The electron back scattering patterns indicated crystal orientation of [101] for monoclinic HfO2 rod phase and [0001] for μt-A1203 matrix in the transverse cross-section. Eu3＋ 4f-4f emission was observed at 550-750 nm.
