›› 2014, Vol. 23 ›› Issue (8): 87806-087806.doi: 10.1088/1674-1056/23/8/087806

• SPECIAL TOPI—International Conference on Nanoscience & Technology, China 2013 • 上一篇    下一篇

A tunable infrared plasmonic polarization filter with asymmetrical cross resonator

陈曦曜a, 钟远刚b, 蒋俊贞b, 曾夏辉a, 傅平a, 邱怡申b, 李晖b   

  1. a Department of Physics and Electronic Information Engineering, Minjiang University, Fuzhou 350108, China;
    b College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350007, China
  • 收稿日期:2013-09-04 修回日期:2014-03-18 出版日期:2014-08-15 发布日期:2014-08-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61178089 and 51277091) and the Natural Science Foundation of Fujian Province, China (Grant No. 2013J05095).

A tunable infrared plasmonic polarization filter with asymmetrical cross resonator

Chen Xi-Yao (陈曦曜)a, Zhong Yuan-Gang (钟远刚)b, Jiang Jun-Zhen (蒋俊贞)b, Zeng Xia-Hui (曾夏辉)a, Fu Ping (傅平)a, Qiu Yi-Shen (邱怡申)b, Li Hui (李晖)b   

  1. a Department of Physics and Electronic Information Engineering, Minjiang University, Fuzhou 350108, China;
    b College of Photonic and Electronic Engineering, Fujian Normal University, Fuzhou 350007, China
  • Received:2013-09-04 Revised:2014-03-18 Online:2014-08-15 Published:2014-08-15
  • Contact: Chen Xi-Yao E-mail:chenxy2628@aliyun.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 61178089 and 51277091) and the Natural Science Foundation of Fujian Province, China (Grant No. 2013J05095).

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摘要： A tunable infrared plasmonic polarization filter is proposed and investigated in this paper. The filter is based on the sandwich absorption structure which consists of three layers. The top layer is an array of asymmetrical cross resonator. The middle and bottom layers are dielectric spacer and metal film respectively. By absorbing specific wavelength of the incident light perfectly, the reflection spectrum of the structure shows filter performance. The calculated results show that the absorption wavelength is strongly dependent on the length of branch of the asymmetrical cross resonator which is parallel to the light polarization and independent of the length of the vertical one. Therefore, the asymmetrical cross resonator filter structure opens the way for freely tuning the filtering wavelength for a different light polarization. We can fix a resonant wavelength (absorption wavelength) corresponding to one polarization and change the resonant wavelength for the other polarization by adjusting the corresponding branch length of the asymmetrical cross resonator, or change the two resonant wavelengths of both two polarizations at the same time.

关键词: polarization filter, asymmetrical cross resonator, numerical simulation

Abstract: A tunable infrared plasmonic polarization filter is proposed and investigated in this paper. The filter is based on the sandwich absorption structure which consists of three layers. The top layer is an array of asymmetrical cross resonator. The middle and bottom layers are dielectric spacer and metal film respectively. By absorbing specific wavelength of the incident light perfectly, the reflection spectrum of the structure shows filter performance. The calculated results show that the absorption wavelength is strongly dependent on the length of branch of the asymmetrical cross resonator which is parallel to the light polarization and independent of the length of the vertical one. Therefore, the asymmetrical cross resonator filter structure opens the way for freely tuning the filtering wavelength for a different light polarization. We can fix a resonant wavelength (absorption wavelength) corresponding to one polarization and change the resonant wavelength for the other polarization by adjusting the corresponding branch length of the asymmetrical cross resonator, or change the two resonant wavelengths of both two polarizations at the same time.

Key words: polarization filter, asymmetrical cross resonator, numerical simulation

中图分类号:  (Multilayers; superlattices; photonic structures; metamaterials)

  • 78.67.Pt
42.25.Bs (Wave propagation, transmission and absorption) 78.20.Bh (Theory, models, and numerical simulation)