Focal length adjustable super lens design based on polarization and stretching control

The invention provides a method for designing a focal length adjustable super lens based on polarization and stretching control. When x polarization and y polarization are incident, the stretching tunable range is 11.4-20.6 microns, the stretching tunable range is 20.7-36.4 microns, and the dynamic focusing range is 213.8% of the minimum focal length. Under the same condition, a polarization-only control super lens and a stretching-only control super lens are also constructed. Comparison shows that the dual-control scheme effectively overcomes the problem that a traditional polarization multiplexing super lens cannot continuously zoom. In addition, compared with a single-control tunable super lens, the design has a considerable focal length tunable range. Therefore, the method has a wide application prospect in the aspects of VR/AR display technology, holographic imaging and the like. 本发明提出一种基于偏振和拉伸控制的焦距可调超透镜设计方法。当x偏振和y偏振入射时，拉伸可调谐范围分别为11.4～20.6um、20.7～36.4um，动态聚焦范围为最小焦距的213.8％。以同样的条件，我们还构造了一个仅偏振控制和一个仅拉伸控制超透镜。