文章基本信息

标题：Experimental nanofocusing of surface plasmon polaritons using a gravitational field
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作者：Zhiwei Yan ; Chong Sheng ; Shining Zhu 等
期刊名称：Nanophotonics
印刷版ISSN：2192-8606
电子版ISSN：2192-8614
出版年度：2020
卷号：-1
期号：ahead-of-print
页码：1-7
DOI：10.1515/nanoph-2020-0059
出版社：Walter de Gruyter GmbH
摘要：How to capture electromagnetic fields into sub-wavelength spatial scales has been a major challenge in nanophotonics, especially confining surface plasmon polaritons into regions as small as a few nanometers. Although various methods are proposed to achieve this goal, these methods require complex fabrication process. Here, we demonstrate experimentally the achievement of nanofocusing of surface plasmon polaritons with an intensity enhancement of three, using the simple structure with just pasting a sliver microwire on a sliver layer. And the designed structure has a well-defined gravitational field inspired by transformation optics. This simple design structure has applications to enhance light–matter interactions, such as nonlinear optical process and Raman scattering.
关键词：gravitational field ; nanofocusing ; transformation optics