对于二维范德瓦尔斯异质结材料，控制原子层间转角可以形成莫尔超晶格材料。通过对层间耦合作用进行调节，可以对超晶格纳米尺度内的材料性质进行调控，构造出电子超材料和光学超材料，在红外光场调控领域拥有重要的应用价值。传统的远场光学实验手段，受限于衍射极限，难以对超晶格纳米尺度内的性质进行研究。在本项目中，我们拟采用散射式近场显微技术，利用其超灵敏和纳米分辨率特点，对二维摩尔超晶格材料在纳米尺度内的红外光学性质进行研究，理解不同原子堆叠方式及其边界的光学特性，并基于此设计具有优异极化激元性质的超晶格结构。通过本项目的研究，我们不但能充分理解层间耦合作用对材料性质的影响，而且可以拓展二维材料极化激元在集成光子学、分子传感等领域的应用。

By controlling the atomic-layer twist angle in van der Waals heterostructures, 2D Moiré superlattice materials are formed. Nanoscale properties of the Moiré superlattice can be engineered by varying the interlayer coupling effects, constructing electronic metamaterials and optical metamaterials which possess promising applications for infrared light manipulations. Traditional far-field optical approaches are restricted by the diffraction limit and fail for the investigation of nanoscale properties in Moiré superlattice. In this project, by employing scattering near-field microscopy with ultra-sensitivity and nanoscale spatial resolution, we will study the nanoscale infrared properties of 2D Moiré supperlattice materials. The optical characteristics for different atom stacking orders and their boundaries will be investigated. Based on that, superlattice with novel polariton properties will be designed. Overall, by the systematic research of the optical properties in Morié supperlattice, not only can the influence of coupling effects on the material properties be deeply understood, but also the applications of 2D material polaritons in like integrated photonics, molecule sensing will be extended.