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      Unidirectional surface plasmon-polariton excitation by a compact slot partially filled with dielectric

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      6. Unidirectional surface plasmon-polariton excitation by a compact slot partially filled with dielectric.pdf (1.271Mb)
      Author
      Li, Dongdong
      Zhang, Dao Hua
      Yan, Changchun
      Li, Tao
      Wang, Yueke
      Xu, Zhengji
      Wang, Jun
      Qin, Fei
      Date of Issue
      2013
      School
      School of Electrical and Electronic Engineering
      Version
      Published version
      Abstract
      We propose a new scheme on unidirectional surface plasmonpolariton (SPP) excitation with the following advantages: ultracompact size, working at arbitrary incidence angle and over a wide spectrum. The proposed structure utilizes a partially filled metallic slot with dielectric to realize unidirectional SPP excitation via direct field manipulation. We theoretically and numerically show that unidirectional SPP excitation with a ratio of 93% can be achieved by a structure with a 50 nm slot. The proposed structure keeps its functional capability over incident angles from −80° to 80°, and has a broadband working spectrum of more than 70 nm.
      Subject
      DRNTU::Engineering::Electrical and electronic engineering
      Type
      Journal Article
      Series/Journal Title
      Optics express
      Rights
      © 2013 Optical Society of America. This paper was published in Optics Express and is made available as an electronic reprint (preprint) with permission of Optical Society of America. The paper can be found at the following official DOI: http://dx.doi.org/10.1364/OE.21.005949. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
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      http://dx.doi.org/10.1364/OE.21.005949
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