基于变换光学理论,提出了一种新型的各向异性均匀的压缩变换介质。通过坐标变换,该压缩变换介质将一片选定的均匀各向同性的自由物理空间“压缩”至一个小的变换区域,并通过补偿介质(ε=μ=-1)来补偿除了压缩区域之外的那片自由空间,以保持空间场分布的连续性。当两个分离的点光源分别处于该压缩变换介质之中的时候,它们能够形成完美的光学重叠效应,即形成完美的光学相干效应。利用有效介质理论,可以进一步简化变换介质参数,获得各向同性均匀的压缩变换介质实现光学重叠效应。该研究在高能相干激光中具有潜在的应用。

In this paper,based on transformation optics,a new anisotropic and homogenous compressible transformation media is proposed.By using the coordinate transformation,such compressible transformation media can be able to compress the selected isotropic and homogenous free space into a small transformation regime.Meanwhile,the corresponding compensating medium(ε=μ=-1) is introduced into the selected free space(except for the transformation regime) in order to keep the continuity of the field distribution.When two separated point sources embedded in such a transformational media,all of them can overlap with each other,leading to the perfect optical interference effect.By using the effective medium theory,such transformational media can be further simplified,and an isotropic and homogenous compressible transformation media is obtained to realize the overlapped optics.Our investigation may have potential application in high power coherent laser beams.