含有NV色心的纳米金刚石，因其出色的光稳定性及相干时间长等优势在微纳光学，量子存储，生物标记，高灵敏物理量探测领域有重要应用。但NV色心低的辐射跃迁几率及光子耦合效率严重阻碍了其应用。探索一种与纳米金刚石相匹配的光学材料及一套稳固的合成方法，增强NV色心发光成为亟待解决和深入研究的难题。本项目提出纳米金刚石/碲锗酸盐玻璃复合微球达到NV色心与其强耦合机制增强荧光。通过研究焓弛豫过程中结构异质现象，探索其影响玻璃转变动力学慢化的物理机制，为组分设计和调控碲锗酸盐玻璃热学性能提供理论依据。探明纳米金刚石的NV色心发光与尺寸数量、制备工艺、提纯方法、泵浦波长和玻璃结构等因素的影响规律。掌握高光学质量纳米金刚石/碲锗酸盐玻璃复合微球的制备工艺。研发稳态可控的异质光纤熔接关键技术，构建全光纤系统，实现NV色心与微球微纳尺度上的高效耦合。本项目为设计和开发新型基于NV色心发光的材料及器件有重要意义。

Nanodiamond containing nitrogen-vacancy (NV) center has important applications in micro-nano optics, quantum storage, biological markers, and detection of high sensitive physical quantities due to its excellent optical stability and long electron spin coherence time. However, low radiative transition probability and photon coupling efficiency of NV color center limits its applications. Exploring a kind of optical material matching with nanodiamond and a set of robust synthesis method to enhance the NV fluorescence is the most difficult issue to be resolved and deeply investigated. This project proposes that the nanodiamond/tellurite germanate glass composite microsphere can achieve fluorescence enhancement of the NVs in the nanodiamond by directly coupling to the microsphere. We will explore the physical mechanism of dynamic slowdown near glass transition in terms of the structural heterogeneity during the process of enthalpy relaxation, which provides theoretical basis for the composition design and thermal properties regulation. Then, the effects of quantity, size, fabrication, purification, pump wavelength and glass structure on the fluorescence of NVs are systematically investigated. In addition, the fabrication of nanodiamond/tellurite germanate glass composite microspheres with high optical quality is developed. Finally, full optical fiber system is designed through the steady controllable heterogeneous optical fiber fusing key technology, which can realize the NV color center efficient coupling to microspheres in micro-nano scale. It is believed that this work can promote the design and development of new NV center based materials and related devices.