随着新兴光学设备对微型化、一体化、智能化光学变焦系统的需求与日俱增, 大大促进了纳米光电子学的迅猛发展。超构透镜是由具有特殊电磁属性的人造元素按照一定的排列方式组成的具有透镜功能的二维平面结构, 其最大优点就是: 轻薄和易于集成。然而, 集成在超构透镜上的微纳结构一旦制备完成, 便难以再改变其形貌或者尺寸, 因而无法对其聚焦性能进行实时调控, 限制了其功能及应用范围的进一步扩展。近年来, 科学家们探索了实现超构透镜聚焦性能实时调控的多种途径, 其中最引人注目的是将智能材料与超构透镜相结合。本文首先回顾了可调谐超构透镜的最新进展, 分别详细阐述和分析了它们的调节原理和器件性能。最后, 归纳分析了当前阻碍可调谐超构透镜发展的主要问题, 并进一步对未来可调谐超构透镜的发展趋势做出了展望。

This paper reports the state of art in a variety of pressure and the detailed study of various matrix based pressure sensors. The performances of the bridges, buildings, etc. are threatened by earthquakes, material degradations, and other environmental effects. Structural health monitoring (SHM) is crucial to protect the people and also for assets planning. This study is a contribution in developing the knowledge about self-sensing smart materials and structures for the construction industry. It deals with the study of self-sensing as well as mechanical and electrical properties of different matrices based on pressure sensors. The relationships among the compression, tensile strain, and crack length with electrical resistance change are also reviewed.