本项目瞄准光通信和全光网络交换中对光缓存(慢光)的迫切需求，提出用二维纳米材料的大色散特性来构造慢光的思路，从模拟和实验两方面系统并深入地研究基于二维纳米材料的慢光波导。本项目提出用二维材料的优势来应对慢光中一直未能解决的三大关键问题（损耗、带宽、动态可控），预期大幅提高慢光的性能。本项目拟用汲取了量子信息的久保公式理论来建模二维材料，借鉴光子晶体的知识来设计宽带慢光波导并进行优化。在此基础上，结合国际最新研究动态，重点研究利用键合衬底减小二维材料慢光损耗，和提高外部光耦合进二维材料（只有原子厚度）的耦合效率。最后，实验验证基于石墨烯的慢光波导，演示动态可调的光缓存，力争将光速减慢到真空中的1/100且慢光带宽大于20nm。由于慢光波导是构成光缓存器件的核心基础结构，本项目的研究成果将为突破光缓存研究的若干瓶颈提供创新的解决方案，证明二维材料是理想的慢光材料，促进光缓存技术的繁荣发展。

Based on the urgent demand of optical buffer in optical communication system and all-optical network, we propose theoretical and experimental study of optical buffer based on two-dimension nano materials due to their large dispersion property. The main drawbacks of present slow light studies, including loss, bandwidth, dynamic control, are compensated with the advantages of two-dimensional nano materials which greatly improve the slow light performance. The topics include: modeling the Kubo formula of two-dimensional nano materials from the quantum theory; design slow light waveguide from the knowledge of previous photonic crystal slow light waveguide; and optimization of the designed results. Furthermore, motivated by the latest research, we will focus our attention on the use of the bonded substrate to reduce the loss of two-dimensional nano materials, and improve the slow light coupling efficiency. Finally,experimental verification of the slow light waveguide based on graphene and the demonstration of the dynamic control will be performed. we aimed to reduce light speed to 1/100 of the vacuum, as well as a bandwidth greater than 20nm. Because slow light waveguide is one of the fundamental structure of optical buffer, our project may help to break the bottlenecks in present research of optical buffer. The results prove that two-dimensional nano materials are ideal for slow light applications, promoting the prosperity and development of optical buffer technology.