The performance of metamaterial is limited to a designed narrow band due to its resonant nature, it is highly desirable to incorporate active inclusions in metamaterials to extend the operation bandwidth. This review summarizes the development in realizing the tunability of electromagnetic response in metamaterials incorporated with nematic liquid crystal (LC). From rigorous comparison, it is found that the anisotropic property of nematic LC is essential in predicting the influence of LC molecular director orientation on the resonant frequency of metamaterials. By carefully designing the metamaterials and properly infiltrating LC, the operation frequency of single/double negative parameters of metamaterials can be dynamically modulated with remarkable red/blue-shift, depending on the LC molecular orientation angle. Moreover, the recent liquid crystal-based developments and novel applications are investigated and highlighted.

由于超材料的共振特性，其性能仅限于设计的窄带，因此非常需要在超材料中掺入活性夹杂物以扩展工作带宽。这篇综述总结了实现向列液晶（LC）的超材料中电磁响应可调性的发展。通过严格的比较发现，向列型液晶的各向异性对预测液晶分子指向矢取向对超材料共振频率的影响至关重要。通过精心设计超常材料并适当渗入LC，可以根据LC分子取向角，以显着的红/蓝移动态调整超常材料的单/双负参数的工作频率。而且，