Planar Lenses Based on Nanoscale Slit Arrays in a Metallic Film
Planar Lenses Based on Nanoscale Slit Arrays in a Metallic Film
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DOI：
10.1021/nl802830y
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发表时间：
2009-01-01
期刊：
影响因子：
10.8
通讯作者：
Fan, Shanhui
中科院分区：
文献类型：
--
作者：
Verslegers, Lieven;Catrysse, Peter B.;Fan, Shanhui
我们在实验上演示了基于金属薄膜中的纳米级狭缝阵列的平面透镜。我们的透镜结构由光学厚度的金膜组成，金膜由微米大小的阵列组成，这些阵列使用聚焦离子束碾磨而成的紧密间隔的、不同宽度的纳米级狭缝。我们发现设计的电磁模拟与制造的结构的共焦测量之间有很好的一致性。我们提供了镜头设计指南，并展示了实际镜头行为如何偏离简单的理论。
We experimentally demonstrate planar lenses based on nanoscale slit arrays in a metallic film. Our lens structures consist of optically thick gold films with micron-size arrays of closely spaced, nanoscale slits of varying widths milled using a focused ion beam. We find excellent agreement between electromagnetic simulations of the design and confocal measurements on manufactured structures. We provide guidelines for lens design and show how actual lens behavior deviates from simple theory.