A Local Superlens
A Local Superlens
复制标题
DOI：
10.1021/acsphotonics.5b00365
复制
发表时间：
2016-01
期刊：
影响因子：
7
通讯作者：
S. C. Kehr;R. G. McQuaid;L. Ortmann;T. Kämpfe;F. Kuschewski;D. Lang;J. Doering;J. Gregg;L. Eng
中科院分区：
文献类型：
--
作者：
S. C. Kehr;R. G. McQuaid;L. Ortmann;T. Kämpfe;F. Kuschewski;D. Lang;J. Doering;J. Gregg;L. Eng
超级透镜可以实现超越光学衍射极限的近场成像。然而，迄今为止，它们在光学成像技术中的广泛实施受到大规模制造、固定镜头位置和特定物体材料的限制。在这里，我们证明了在所有三个空间维度上亚波长尺寸的介电薄片充当紧凑的超级透镜，在红外波长下工作，并且可以定位以对样品上感兴趣的任何局部微观区域进行成像。特别是，薄片超级透镜可以放置为与任何类型的物体接触，因此能够检查难以扫描的样本，例如具有高形貌或在液体中的样本，而无需改变样本设计。这种基于薄片的局部超级透镜设计可直接应用于基于亚波长光的技术，例如集成光学。
Superlenses enable near-field imaging beyond the optical diffraction limit. However, their widespread implementation in optical imaging technology so far has been limited by large-scale fabrication, fixed lens position, and specific object materials. Here we demonstrate that a dielectric lamella of subwavelength size in all three spatial dimensions behaves as a compact superlens that operates at infrared wavelengths and can be positioned to image any local microscopic area of interest on the sample. In particular, the lamella superlens may be placed in contact with any type of object and therefore enables examination of hard-to-scan samples, for example, with high topography or in liquids, without altering the specimen design. This lamella-based local superlens design is directly applicable to subwavelength light-based technology, such as integrated optics.