稀土离子掺杂微晶玻璃上转换发光超快量子调控的研究

The rare-earth ions have these characteristics with good luminescence properties, pure luminescence chromaticity, stable physical and chemical properties and high conversion efficiency because of the special 4f electronic structure, while the glass ceramics as the glass and crystal composites have both the excellent luminescence properties of crystal luminescent material and the excellent uniformity, machinability and stability of glass material and are considered as the good matrix material, and so the studies on luminescence properties of rare-earth ion doped glass ceramics have attracted considerable attention of scientists in recent years. In this project, we propose a femtosecond laser field to generate and control the up-conversion luminescence in the rare-earth ion doped glass ceramics, develop a multi-color femtosecond laser field, asymmetric femtosecond laser field, shaped femtosecond laser field and time-dependent polarization femtosecond laser field to improve the up-conversion luminescence efficiency of rare-earth ion doped glass ceramics and realize the multi-color tuning, illustrate the physical control mechanism of the target excited state absorption and the energy transfer between two rare-earth ions, and finally establish the new technique of the up-conversion luminescence control in the rare-earth ion doped glass ceramics. Through this project research, it can provide a new experimental technique for the up-conversion luminescence control of rare-earth ions doped glass ceramics, and also can provide the experimental and theoretical research basis for the future applications of rare-earth ion doped glass ceramics in various related areas.

稀土离子由于其特殊的4f电子层结构, 因而具有良好的荧光特性、发光色度纯、物化性质稳定、转换效率高等特点，而微晶玻璃作为一种晶态和非晶态共存的材料,兼具了晶体发光材料优异的发光性能及玻璃材料优异的均匀性,可加工性及稳定性, 是一种良好的掺杂基质材料，因而稀土离子掺杂微晶玻璃发光特性研究近年来受到国内外学者的高度关注。本项目提出一种利用飞秒激光场来产生和控制稀土离子掺杂微晶玻璃上转换发光的新方法，发展多色飞秒激光场、不对称飞秒激光场、时频域整形飞秒激光场和含时偏振飞秒激光场方法来提高稀土离子掺杂微晶玻璃上转换发光效率以及实现多色调谐，揭示稀土离子特定能级吸收和稀土离子间能量转移控制的物理机制，并建立稀土离子掺杂微晶玻璃上转换发光调控的新技术。通过该项目研究为稀土离子掺杂微晶玻璃上转换发光控制提供一种全新实验新技术手段，同时为稀土离子掺杂微晶玻璃在各种相关领域应用提供研究基础。

微晶玻璃作为一种晶态和非晶态共存的材料，兼具晶体发光材料优异的发光性能和玻璃材料优异的均匀性、稳定性和可加工性，是一种良好掺杂基质材料。稀土离子由于其独特的电子层结构，具有发光色度纯、物化性质稳定、转换效率高等特性。稀土离子掺杂微晶玻璃在微纳发光材料、色彩显示等方面具有重要的应用前景，因此受到科研界的广泛关注。 本项目执行期间，开展了利用相位整形飞秒光场、时频整形飞秒光场、含时偏振飞秒光场以及多色飞秒光场等调控稀土离子掺杂微晶玻璃上转换发光、价态转换等方面的科学研究，并探讨了相关的物理机制、原理，获得了一系列新的、富有科学价值的研究成果,并在国际知名公开学术刊物发表。本项目的研究为稀土离子掺杂微晶玻璃上转换发光的量子调控提供和验证了一种全新的光学技术手段，并为稀土离子掺杂发光材料及其应用等相关领域的研究提供了重要的理论和实验基础。