摘要
The enhanced laser cooling performance of rare-earth-ions-doped glasses containing small particles is predicted. This is achieved by the enhancement of local field around rare earth ions, owing to the surface plasmon resonance of small metallic particles. The role of energy transfer between ions and the particle is theoretical discussed. Depending on the particle size and the ion emission quantum efficiency, the enhancement of the absorption and the fluorescence is predicted. Moreover, taking Yb^3＋-doped ZBLAN as example, the cooling power and heat-light converting efficiency are calculated. It is finally concluded that the absorption and the fluorescence are greatly enhanced in these composite materials, the cooling power is increased compared to the bulk material.
基金
supported by the National Natural Science Foundation of China under Grant Nos.10434060 and 10674047
the Doctor Foundation of the Ministry of Education under Grant No.20040269010
Shanghai Priority Academic Discipline,and the 211 Foundation of the Ministry of Education Doctor Program Scholarship Fund of ECNU 2007
