Deep subwavelength electromagnetic transparence through dual metallic gratings with ultranarrow slits

Author

Chunyin Qiu ; Sucheng Li ; Ruirui Chen ; Bo Hou ; Feng Li ; Zhengyou Liu

Author_Institution

Key Lab. of Artificial Micro- & Nano-Struct. of Minist. of Educ., Wuhan Univ., Wuhan, China

fYear

2012

fDate

8-10 Oct. 2012

Firstpage

1

Lastpage

3

Abstract

We study the transmission response of microwaves through two identical metallic plates perforated with periodical ultranarrow slits. The experimental and numerical transmission spectra consistently display a striking transmission peak at wavelength much larger than any characteristic length of the microstructure (e.g., about 20-fold of the lattice constant), which can not be directly interpreted 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.

Keywords

diffraction gratings; electromagnetic wave transmission; microwave materials; LC circuit based microscopic picture; deep subwavelength electromagnetic transparence; dual metallic gratings; effective medium based macroscopic model; lattice constant; metallic plates; transmission response; ultranarrow slits; Color; Educational institutions; Gratings; Lattices; Microstructure; Physics; Resonant frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Metamaterials (Meta), 2012 International Workshop on

Conference_Location

Nanjing

Print_ISBN

978-1-4673-2807-4

Type

conf

DOI

10.1109/META.2012.6464907

Filename

6464907