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arXiv 0812.0508physics.optics
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无倏逝波超分辨

Super-resolution without Evanescent Waves

Fu Min Huang, Nikolay I. Zheludev

摘要:

在过去的十年中,已经看到了许多努力,以实现成像分辨率超过阿贝-瑞利衍射极限。旨在打破这一限制的研究的主要方向是寻求利用包含物体紧邻处的电磁场分布的精细细节的倏逝分量。在这里,我们提出了一个解决方案,消除了对倏逝场的需要。以亚波长精度被成像或激励的对象不需要紧邻超透镜或场集中器:可以设计光学掩模,其产生被称为超振荡的波的相长干涉,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,而且可以用作超分辨率成像装置。

英文摘要:

The last decade has seen numerous efforts to achieve imaging resolution beyond that of the Abbe-Rayleigh diffraction limit. The main direction of research aiming 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 sub-wavelength 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 sub-wavelength 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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