Experimental verification of a zero-index near-infrared metamaterial

Author

Jiang, Zhi Hao ; Yun, Seokho ; Xu, Qian ; Werner, Douglas H. ; Liu, Zhiwen ; Mayer, Theresa S.

Author_Institution

Dept. of Electr. Eng., Pennsylvania State Univ., University Park, PA, USA

fYear

2011

fDate

3-8 July 2011

Firstpage

1181

Lastpage

1184

Abstract

In this paper, we present a free-standing optical zero-index metamaterial (ZIM) with a symmetric structure in the direction of wave propagation. The metamaterial consists of a gold-polyimide-gold tri-layer stack perforated by air holes to form a fishnet geometry. With the aid of a genetic algorithm (GA), this structure is optimized to exhibit a near-zero refractive index with low absorption loss and a good impedance match to free space. The ZIM was fabricated and characterized. The measured results are found to be in strong agreement with the simulation predictions.

Keywords

genetic algorithms; gold; metamaterials; optical multilayers; optical polymers; air holes; fishnet geometry; free-standing optical zero-index metamaterial; genetic algorithm; gold-polyimide-gold tri-layer stack; impedance match; low absorption loss; near-zero refractive index; symmetric structure; wave propagation; zero-index near-infrared metamaterial; Genetic algorithms; Gold; Holography; Indexes; Metamaterials; Reflection; Scattering parameters; freestanding; metamaterial; zero-index;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on

Conference_Location

Spokane, WA

ISSN

1522-3965

Print_ISBN

978-1-4244-9562-7

Type

conf

DOI

10.1109/APS.2011.5996495

Filename

5996495