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Asia Conference on Nanoscience and Nanotechnology Abstracts Book

作者： Zhongcheng FAN Rongbiao YU Xiaoming QIU Kehan YU Xiangxing XU Lei JIANG Sanming SI Dan CHEN Li XU Lei ZHAO Bo PENG Wei HUANGInstitute of Advanced Materials Fudan University Shanghai 200433 China.

＜正＞ Solid state lasers have been widely used in defense works, mechanical processing, information technology and many other areas. However, they still have quite a few disadvantages. As is well known, it is costly and difficult to homogeneously manufacture the crystal and glass bulks in big size. These solid bulks can not avoid defects, which will develop damaged spots when running before the spots grow rapidly. The growing spots are very harmful and even dangerous for the performance and maintenance of high power laser systems. What is more, it is awfully difficult to cool the solid lasing materials, thus the running cycle period and working life shrank badly, and the laser system become low repeated usable. Fortunately, inorganic liquid laser can gracefully tackle such nuts. First of all, it is pretty easy to get lasing liquid in almost unlimited volume at a uniform density. As far as most thin liquids are concerned, the structure is nearly ideally homogenized when flowing. Even if some defects are developed while lasing, the spots will get resolved by the flowing ambient branches to prevent such damage. It is also quite convenient to realize the high repeated laser to prolong both the running cycle period and working life. In our work, neodymium doped yttrium aluminum garnet （Nd: YAG） was manufactured through the aqueous solutions of aluminum, yttrium and neodymium chlorides. After calcination and sinter, Nd: YAG nanocrystals by the size of tens of nanometers were realized. They were homogeneously dispersed in inorganic solvent, such as POCl3, BBr3 and TiCl4, with properly adjusted refractive index and density. Tbe laser emission was also achieved while the mixture was recirculated. It might have a potential application in high repeated laser system.

关键词： liquid laser inorganic nanosized particle.

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Luminescent properties of a new Nd^(3+)-doped complex with two different carboxylic acids and pyridine derivative

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Rare Metals 2013年第5期32卷 490-495页

作者： Yun-Xia Ye Li-Hua Wei Wei-Chen Mei Chen Yin-Qun Hua School of Mechanical Engineering Jiangsu University Institute of laser Technology Jiangsu University School of Material Engineering Jiangsu University

A new Nd3＋-doped organic complex featuring two different perfluorinated carboxylic acids as the first ligand and pyridine derivative 2-amino-3-chloro-5-（tri- fluoromethyl）pyridine as the second ligand was designed and synthesized. Successful coordination between the ligands and central rare earth ions was confirmed by Fourier transform infrared spectroscopy （FT-IR） spectra, 1H nuclear magnetic resonance （1H NMR） spectra, and UV spectra, and the synthesized complex is inferred to be eight-coordinate structure. Solution of the complex dis- solved in DMSO-d6 was prepared and then its fluorescence spectrum, UV-Vis-NIR absorption spectrum, and fluorescence decay curve were tested. The fluorescent lifetime is about 7 txs. Based on the above experimental research, Judd-Ofelt analysis was carried out, and the results indi- cate that appropriate coordination environment around Nd3＋ in this solution results in a high fluorescent quantum efficiency 2 % and a large stimulated emission cross-section about 3.2 × 10^-20 cm^2 at 1,064 nm.

关键词： Nd Organic solution liquid laser Quantum efficiency Judd-Ofelt theory

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