飞秒激光诱导稀土离子掺杂的固态介质的上转换发光
文献类型：学位论文
| 作者 | 汪晨 |
| 学位类别 | 博士 |
| 答辩日期 | 2007 |
| 授予单位 | 中国科学院上海光学精密机械研究所 |
| 导师 | 邱建荣 |
| 关键词 | 飞秒激光 多光子吸收 上转换发光 三维立体显示 玻璃 |
| 其他题名 | Upconversion Luminescence of Rare Earth doped Solid State Materials by Femtosecond Laser Irradiation |
| 中文摘要 | 三维彩色立体显示在计算机辅助设计、医疗诊断、屏幕显示、飞行模拟与控制、遥控机器人、建筑设计、户外公共艺术以及文化娱乐方面有着广阔的应用前景。从20世纪80年代开始，各国政府、公司和研究机构开始着力研究三维立体显示技术，日本和欧盟等国更是推行国家计划以及整合产学研资源，全固态的立体三维显示受到了越来越多的重视。 本文首先介绍了上转换发光、多光子吸收的概念，以及有关飞秒激光的定义及其与物质相互作用的研究进展，然后简述了三维立体显示技术的研究进展以及目前存在的问题。 课题主要研究了关于可用于三维立体显示材料的稀土掺杂固体介质在飞秒激光诱导下的上转换发光。取得了一些创新性成果，主要包括以下几个方面的内容： 1．制备了Tb3+、Eu3+、Ce3+分别掺杂的硼硅酸盐（K9）玻璃，以近红外飞秒激光激发，首次发现可以得到绿色、红色、蓝色的上转换发光。 2．制备了Dy3+掺杂的氟铝酸盐玻璃，以近红外飞秒激光激发，发现了黄色的上转换发光。分别在Eu3+:Ca2Al2SiO7晶体和Ce3+: LSO晶体中发现了红色和蓝色的上转换发光。 3．通过分析上述发光的荧光光谱、吸收光谱以及激发光谱，认为在Tb3+、Eu3+、Dy3+掺杂的固态介质中，飞秒激光激发的上转换发光为双光子过程；而在Ce3+掺杂的玻璃及晶体中，飞秒激光激发的上转换发光为三光子过程。 4．研究了上述上转换发光的机理，首次得出飞秒激光诱导稀土离子掺杂的固态介质的上转换发光为双光子或三光子同时吸收的上转换过程的结论。 5．计算了Tb3+、Eu3+、Ce3+分别掺杂的硼硅酸盐（K9）玻璃在飞秒激光激发时的吸收因子和吸收截面，其中Tb3+的双光子吸收因子为3.65×10-8(cm•w)-1，双光子吸收截面为3.07×10-47cm2w-1；Eu3+的双光子吸收因子为5.83×10-8(cm•w)-1，双光子吸收截面为4.69×10-47cm2w-1s；Ce3+的三光子吸收因子为8.95×10-24cm3W−2，三光子吸收截面为1.67×10-80 cm6 S2。 6．在Tb3+掺杂的K9玻璃中，进行了三维立体显示的基础演示，为全固态三维立体显示技术的发展提供了新思路和研究基础。 |
| 英文摘要 | Three-dimensional display technology has wide applications in museums, exhibition halls and family recreation areas, and especially has broad application prospects in medical, defense, military and aerospace fields. From the 1980s of the 20th century, governments, companies and research organizations have begun to focus on three-dimensional display. Japan and the EU are implementing the national plan to develop this technology. And the solid-state three-dimensional volumetric display receives more and more attentions from 1990s of the 20 century. At the beginning, this thesis introduces the conception of upconversion luminescence, multi-photon absorption and femtosecond laser. Then it gives an overview of the recent progress and existed problems on three-dimensional display technology. This dissertation is focused on the study of the upconversion luminescence of rare earth ions doped solid-state materials by femtosecond laser irradiations. Some novel academic results are obtained during the several years study, which are listed as following: 1. Tb3+, Eu3+, Ce3+ doped borosilicate glasses are prepared respectively. The green, red and blue upconversion luminescences of the samples irradiated by infrared femtosecond laser are observed for the first time to our knowledge. 2. Dy3+ doped fluoaluminate glasses are prepared and yellow upconversion luminescence is observed when irradiated by infrared femtosecond laser. 3. The absorption spectra, photoluminescence spectra and excitation spectra of those rare earth ions doped solid-state materials are measured and analyzed. The upconversion luminescence process of Tb3+, Eu3+, and Dy3+ doped materials are two-photon simultaneous absorption process while the one of Ce3+ doped materials is three-photon simultaneous absorption process, which are acquired by analyzing the relationship between the fluorescence intensity and the pumping power and the absorption spectra. 4. The values of the multi-photon absorption coefficient and the multi-photon absorption cross section of the rare earths are calculated which are listed in the thesis. 5. We demonstrated the basic three-dimensional display phenomena successfully in Tb3+ doped borosilicate glasses based on the multiphoton upconversion luminescence by focused femtosecond laser irradiation. This accomplishment will promote the development of solid-state three-dimensional display technology greatly. |
| 语种 | 中文 |
| 源URL | [http://ir.siom.ac.cn/handle/181231/15484]  |
| 专题 | 上海光学精密机械研究所_学位论文 |
| 推荐引用方式 GB/T 7714 | 汪晨. 飞秒激光诱导稀土离子掺杂的固态介质的上转换发光[D]. 中国科学院上海光学精密机械研究所. 2007. |
入库方式： OAI收割
来源：上海光学精密机械研究所
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