期刊
OPTICS LETTERS
卷 41, 期 15, 页码 3551-3554出版社
OPTICAL SOC AMER
DOI: 10.1364/OL.41.003551
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资金
- State Key Program for Basic Research of China [2014CB360505, 2012CB921501]
- National Natural Science Foundation of China (NSFC) [11374224]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
We propose a method for the design of gradient wire structures that are capable of converting propagating waves into guided waves along the wire. The conversion process is achieved by imposing an additional wave vector to the scattered waves via the gradient wire structure, such that the wave vector of scattered waves is beyond the wave number in the background medium. Thus, the scattered waves turn into evanescent waves. We demonstrate that two types of gradient wire structures, with either a gradient permittivity and a fixed radius, or a gradient radius and a fixed permittivity, can both be designed to realize such a wave conversion effect. The principle demonstrated in our work has potential applications in various areas including nanophotonics, silicone photonics, and plasmonics. (C) 2016 Optical Society of America
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