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高极化纯度的超表面透镜设计与应用

高向军 朱莉 郭文龙

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高极化纯度的超表面透镜设计与应用

高向军, 朱莉, 郭文龙

Design and application of high polarized purity metasurface lens

Gao Xiang-Jun, Zhu Li, Guo Wen-Long
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  • 针对超表面在透镜方面的应用,基于各向异性超表面单元设计了一款高极化纯度的聚焦超表面透镜,并探讨了其在高增益高极化纯度天线方面的应用.设计了一款具有极化滤波特性的各向异性超表面单元,单元对x极化波保持高透性的同时,对y极化波保持近乎为零的透射率.利用该型单元设计了焦距为30 mm、阵列大小为105 mm105 mm、单元数为2121的聚焦超表面透镜.根据光路可逆原理,焦点处发出的球面波被超表面透镜有效转化为平面波,从而达到提高天线增益的目标.实验中分别用不同极化形式的球面波照射聚焦超表面来研究超表面对不同极化波的控制特性.结果表明,x极化波照射时,超表面工作于透镜模式,球面波转化为平面波,天线增益大大提高;y极化波照射时,超表面类似于金属板,将入射波全部反射;x/y极化混合波照射时,天线增益大大提高,且极化隔离度高于25 dB,充分说明设计的聚焦超表面在提高x极化波增益的同时可高效滤除y极化波,达到了高增益高极化纯度的目标.
    Dealing with potential applications of metasurface in lens technologies, we propose a focusing metasurface with high polarized purity based on anisotropic elements, and then put it into application of high gain antenna with high polarized purity. Firstly, we design a metasurface cell with the polarization filtering characteristic, which is capable of transmitting the x-polarized waves efficiently while reflecting the y-polarized waves completely. By changing the metallic patch size, we can modulate the phase shift for the x-polarized transmitting waves. Then by imposing a hyperboloidal phase profile onto the surface, we design a metasurface lens with 105 mm105 mm in size, 2121 in cell number, and 30 mm in focal length. According to the principle of reversibility of light path, the spherical waves emitted from the patch antenna can be converted into plane waves by the focusing metasurface lens, which is used to improve the antenna gain. As for the experiment, we tend to obtain the metasurface lens impinged by differently polarized waves in order to study the lens response to differently polarized waves. The results show that the metasurface acts as a lens when impinged by the x-polarized waves but serves as a reflector when illuminated by the y-polarized waves. That is to say, the y-polarized waves are mostly filtered out while the x-polarized waves are efficiently transmitted and focused, which is in good accordance with the designed principle. Assuming that a patch antenna emits the x/y-polarized waves at the focal point, we obtain not only the antenna gain improved remarkably but also polarized isolation above 25 dB in the operating bandwidth of the designed metasurface. The results of the antenna application give a further proof of the designed lens which eventually contributes to the high gain and high polarized purity of the lens antenna.
      通信作者: 郭文龙, 13259461383@163.com
    • 基金项目: 国家自然科学基金(批准号:61372034)资助的课题.
      Corresponding author: Guo Wen-Long, 13259461383@163.com
    • Funds: Project supported by the National Natural Science Foundation of China (Grant No. 61372034).
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  • [1]

    Pendry J B, Schurig D, Smith D R 2006 Science 312 1780.

    [2]

    Yu N F, Yu N F, Genevet P, Kats M A, Aieta F, Tetienne J P, Capasso F, Gaburro Z 2011 Science 334 333

    [3]

    Zhang K, Ding X M, Zhang L, Wu Q 2014 New J. Phys. 16 103020

    [4]

    Pu M B, Chen P, Wang C T, Wang Y Q, Zhao Z Y, Hu C G, Huang C, Luo X G 2013 AIP Adv. 3 052136

    [5]

    Sun Y Y, Han L, Shi X Y, Wang Z N, Liu D H 2013 Acta Phys. Sin. 62 104201 (in Chinese)[孙彦彦, 韩璐, 史晓玉, 王兆娜, 刘大禾2013物理学报62 104201]

    [6]

    Wei Z Y, Cao Y, Su X P, Gong Z J, Long Y, Li H Q 2013 Opt. Express 21 010739

    [7]

    Guo W L, Wang G M, Li H P, Hou H S 2016 Acta Phys. Sin. 65 074101 (in Chinese)[郭文龙, 王光明, 李海鹏, 侯海生2016物理学报65 074101]

    [8]

    Yang Q L, Gu J Q, Wang D Y, Zhang X Q, Tian Z, Ouyang C M, Ranjan S, Han J G, Zhang W L 2014 Opt. Express 22 25931

    [9]

    Cheng J R, Hossein M 2014 Opt. Lett. 39 2719

    [10]

    Lee J H, Yoon J W, Jung M J, Hong J K, Song S H, Magnusson R 2014 Appl. Phys. Lett. 104 233505

    [11]

    Saeidi C, Weide D V D 2015 Appl. Phys. Lett. 106 113110

    [12]

    Kang M, Feng T H, Wang H T, Li J S 2012 Opt. Express 20 15883

    [13]

    Fleury R, Sounas D L, Alu A 2014 Phys. Rev. Lett. 113 023903

    [14]

    Qu S W, Wu W W, Chen B J, Yi H, Bai X, Ng K B, Chan C H 2015 Sci. Rep. 5 963

    [15]

    Aieta F, Genevet P, Kats M A, Yu N F, Blanchard R, Gaburro Z, Capasso F 2012 Nano Lett. 12 4932

    [16]

    Li X, Xiao S Y, Cai B G, He Q, Cui T J, Zhou L 2012 Opt. Lett. 37 4940

    [17]

    Pors A, Nielsen M G, Eriksen R L, Bozhevolnyi S I 2013 Nano Lett. 13 829

    [18]

    Li H P, Wang G M, Xu H X, Cai T, Liang J G 2015 IEEE Trans. Antennas. Propag. 63 5144

    [19]

    Li T J, Liang J G, Li H P 2016 Acta Phys. Sin. 65 104101 (in Chinese)[李唐景, 梁建刚, 李海鹏2016物理学报65 104101]

    [20]

    Ke Y G, Liu Y C, Zhou J X, Liu Y Y, Luo H L, Wen S C 2016 Appl. Phys. Lett. 108 101102

    [21]

    Ke Y G, Liu Z X, Liu Y C, Shu W X, Luo H L, Wen S C 2016 Appl. Phys. Lett. 109 181104

    [22]

    Ke Y G, Liu Y C, Zhou J X, Liu Y Y, Luo H L, Wen S C 2015 Opt. Express 23 33079

    [23]

    Li Y, Jiang X, Li R Q, Liang B, Zou X Y, Yin L L, Cheng J C 2014 Phys. Rev. Appl. 2 064002

    [24]

    Hu D, Moreno G, Wang X K, He J W, Chahadih A, Xiw Z W, Wang B, Akalin T, Zhang Y 2014 Opt. Commun. 322 164

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出版历程
  • 收稿日期:  2017-03-22
  • 修回日期:  2017-05-30
  • 刊出日期:  2017-10-05

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