Double-rod metasurface for mid-infrared polarization conversion

Resonant responses of metasurface enable effective control over the polarization properties of lights. In this paper,we demonstrate a double-rod metasurface for broadband polarization conversion in the mid-infrared region. The metasurface consists of a metallic double-rod array separated from a refl...

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Bibliographic Details
Published inChinese physics B Vol. 27; no. 2; pp. 355 - 360
Main Author 蒲洋;罗意;刘路;何德;徐洪艳;景洪伟;蒋亚东;刘志军
Format Journal Article
LanguageEnglish
Published 01.02.2018
Subjects
极化变换;红外线;极化性质;变换效率;物理机制;水流分布;THz;金属性
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ISSN1674-1056
2058-3834
DOI10.1088/1674-1056/27/2/024202

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Summary:Resonant responses of metasurface enable effective control over the polarization properties of lights. In this paper,we demonstrate a double-rod metasurface for broadband polarization conversion in the mid-infrared region. The metasurface consists of a metallic double-rod array separated from a reflecting ground plane by a film of zinc selenide. By superimposing three localized resonances, cross polarization conversion is achieved over a bandwidth of 16.9 THz around the central frequency at 34.6 THz with conversion efficiency exceeding 70%. The polarization conversion performance is in qualitative agreement with simulation. The surface current distributions and electric field profiles of the resonant modes are discussed to analyze the underlying physical mechanism. Our demonstrated broadband polarization conversion has potential applications in the area of mid-infrared spectroscopy, communication, and sensing.
Bibliography:metasurface polarization conversion mid-infrared broadband
Resonant responses of metasurface enable effective control over the polarization properties of lights. In this paper,we demonstrate a double-rod metasurface for broadband polarization conversion in the mid-infrared region. The metasurface consists of a metallic double-rod array separated from a reflecting ground plane by a film of zinc selenide. By superimposing three localized resonances, cross polarization conversion is achieved over a bandwidth of 16.9 THz around the central frequency at 34.6 THz with conversion efficiency exceeding 70%. The polarization conversion performance is in qualitative agreement with simulation. The surface current distributions and electric field profiles of the resonant modes are discussed to analyze the underlying physical mechanism. Our demonstrated broadband polarization conversion has potential applications in the area of mid-infrared spectroscopy, communication, and sensing.
Yang Pu1, Yi Luo1, Lu Liu1, De He1, Hongyan Xu2, Hongwei Jing2, Yadong Jiang1, and Zhijun Liu（ 1 School of Optoelectronic Information, University of Electronic Science and Technology of China, Chengdu 610054, China 2Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China）
11-5639/O4
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/27/2/024202