Super-Resolution without Evanescent Waves
Super-Resolution without Evanescent Waves
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DOI：
10.1021/nl9002014
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发表时间：
2009-03-01
期刊：
影响因子：
10.8
通讯作者：
Zheludev, Nikolay I.
中科院分区：
文献类型：
--
作者：
Huang, Fu Min;Zheludev, Nikolay I.
在过去的十年中，人们为实现超出阿贝-瑞利衍射极限的成像分辨率做出了许多努力。旨在打破这一限制的主要研究方向是寻求利用包含物体紧邻处电磁场分布的精细细节的倏逝分量。在这里，我们提出了一种无需渐逝场的解决方案。以亚波长精度成像或刺激的物体不需要紧邻超级透镜或场集中器：可以设计光学掩模来产生称为超振荡的相长波干涉，当被单色波照射时，在渐逝场之外的视场中产生规定尺寸和形状的亚波长焦点。此外，我们证明这种掩模不仅可以用作聚焦装置，还可以用作超分辨率成像装置。
The past decade has seen numerous efforts to achieve imaging resolution beyond that of the Abbe-Rayleigh diffraction limit. The main direction of research alining to break this limit seeks to exploit the evanescent components containing fine detail of the electromagnetic field distribution at the Immediate proximity of the object. Here, we propose a solution that removes the need for evanescent fields. The object being imaged or stimulated with subwavelangth accuracy does not need to be In the immediate proximity of the superlens or field concentrator: an optical mask can be designed that creates constructive Interference of waves known as superoscillation, leading to a subwavelength focus of prescribed size and shape in a field of view beyond the evanescent fields, when illuminated by a monochromatic wave. Moreover, we demonstrate that such a mask may be used not only as a focusing device but also as a super-resolution imaging device.