Optimizing the superlens: Manipulating geometry to enhance the resolution
Optimizing the superlens: Manipulating geometry to enhance the resolution
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DOI：
10.1063/1.2139620
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发表时间：
2005-09
影响因子：
4
通讯作者：
V. Podolskiy;N. Kuhta;G. Milton
中科院分区：
文献类型：
--
作者：
V. Podolskiy;N. Kuhta;G. Milton
我们分析了基于广义几何中的真实负折射率材料的平面透镜的性能。我们证明，从分辨率的角度来看，传统的超级透镜设计（透镜位于物体和图像之间的中心）并不是最佳的，开发了广义透镜分辨率极限的解析表达式，用它来找到最佳透镜配置，并计算实际近场超级透镜可能具有的最大吸收。我们证明，与传统的超级透镜图像相比，平面成像通常伴随着透镜两个界面处的表面波的激发。
We analyze the performance of a planar lens based on realistic negative index material in a generalized geometry. We demonstrate that the conventional superlens design (where the lens is centered between the object and the image) is not optimal from the resolution point of view, develop an analytical expression for the resolution limit of a generalized lens, use it to find the optimum lens configuration, and calculate the maximum absorption practical nearfield superlenses may have. We demonstrate that in contrast to the conventional superlens picture, planar imaging is typically accompanied by excitation of surface waves at both interfaces of the lens.