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针对圆极化波, 通过同极化反射超表面结构单元的空间排布, 设计实现了一种二维非色散高效相位梯度超表面. 同极化反射相位可以通过同极化反射超表面结构单元金属线的面内旋转来自由调控. 实现的相位梯度超表面可对左右旋入射波产生相反的相位梯度. 当线极化波入射到超表面上时, 反射波被分为两束向相反方向传播的圆极化波. 仿真了线极化波垂直入射时的反射功率密度谱, 仿真结果与理论上设计的异常反射方向一致. 制作了厚度为2 mm的超表面样品, 测试了其镜面反射率曲线. 实验结果表明, 线极化波垂直入射时, 超表面在9.5-19.0 GHz的镜面反射率降至-5 dB以下.For dealing with circularly polarized waves, a high-efficient two-dimensional dispersionless phase-gradient metasurface is devised and achieved by spatially arranging co-polarized reflective metasurface unit cells. The phase of the co-polarized reflection can be freely modulated via a rotating metallic wire of the co-polarized reflective metasurface unit cell in-plane. The achieved phase gradient metasurface can produce opposite-sign phase gradient for left-and right-handed circularly polarized incident waves. During linearly polarized wave incidence, the reflected waves will decompose into two counter-directionally propagating circularly polarized waves. Reflective power density spectra for the linearly polarized wave in normal incidence are simulated, which are well consistent with the theoretically designed anomalous reflection direction. A 2 mm thick sample is fabricated and the mirror reflectivity curve is measured. Experimental results show that for linearly polarized wave normal incidence, the mirror reflectivity is reduced to below -5 dB in a wide band from 9.5 to 17.0 GHz.
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[19] SunY 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 62 104201]
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[21] Paul O, Reinhard B, Krolla B, Beigang R, Rahm M 2010 Appl. Phys. Lett. 96 241110
[22] Pendry J B, Schurig D, Smith D R 2006 Science 312 1780
[23] Xu X H, Wu X, Xiao S Q, Gan Y H, Wang B Z 2013 Acta Phys. Sin. 62 084101 (in Chinese) [徐新河, 吴夏, 肖绍球, 甘月红, 王秉中 2013 62 084101]
[24] Wang J F, Zhang J Q, Ma H, Yang Y M, Wu X, Qu S B, Xu Z, Xia S 2010 Acta Phys. Sin. 59 1851 (in Chinese) [王甲富, 张介秋, 马华, 杨一鸣, 吴翔, 屈绍波, 徐卓, 夏颂 2010 59 1851]
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[1] Feng M D, Wang J F, Ma H, Mo W D, Ye H J, Qu S B 2013 J. Appl. Phys. 114 074508
[2] Chen H Y, Wang J F, Ma H, Qu S B, Xu Z, Zhang A X, Yan M B, Li Y 2014 J. Appl. Phys. 115 154504
[3] Huang X J, Yang D, Yang H L 2014 J. Appl. Phys. 115 103505
[4] Ma H F, Wang G Z, Kong G S, Cui T J 2014 Opt. Mater. Express 4 1717
[5] Zhao Y, Alu à 2011 Phys. Rev. B 84 205428
[6] Zhu H L, Cheung S W, Chung K L, Yuk T I 2013 IEEE Trans. Antennas Propag. 61 4615
[7] Yu N, Genevet P, Kats M A, Aieta F, Tetienne J P, Capasso F, Gaburro Z 2011 Science 334 333
[8] Aieta F, Genevet P, Yu N, Kats M A, Gaburro Z, Capasso F 2012 Nano Lett. 12 1702
[9] Genevet P, Yu N F, Aieta F, Lin J, Kats M A, Blanchard R, Scully M O, Gaburro Z, Capasso F 2012 Appl. Phys. Lett. 100 013101
[10] Yu N F, Capasso F 2014 Nat. mater. 13 139
[11] Yu N, Aieta F, Genevet P, Kats M A, Gaburro Z, Capasso F 2012 Nano Lett. 12 6328
[12] Sun S L, He Q, Xiao S Y, Xu Q, Li X, Zhou L 2012 Nat. Mater. 11 426
[13] Nathaniel K. Grady N K, Heyes J E, Chowdhury D R, Zeng Y, Reiten M T, Azad A K, Taylor A J, Dalvit D A R, Chen H T 2013 Science 340 1304
[14] Huang L L, Chen X Z, Bai B F, Tan Q F, Jin G F, Zentgraf T, Zhang S 2013 Light: Science & Applications 2 e70
[15] Huang L L, Chen X Z, Mhlenbernd H, Li G X, Bai B F, Tan Q F, Jin G F, Zentgraf T, Zhang S 2012 Nano lett. 12 5750
[16] Li Y F, Zhang J Q, Qu S B, Wang J F, Chen H Y, Zheng L, Xu Z, Zhang A X 2014 J. Phys. D: Appl. Phys. 47 425103
[17] Wang J F, Qu S B, Ma H, Xu Z, Zhang A X, Zhou H, Chen H Y, Li Y F 2012 Appl. Phys. Lett. 101 201104
[18] Francesco M, Andrea A 2014 Chin. Phys. B 23 047809
[19] SunY 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 62 104201]
[20] Pinchuk A O, Schatz G C 2007 J. Opt. Soc. Am. 24 2313
[21] Paul O, Reinhard B, Krolla B, Beigang R, Rahm M 2010 Appl. Phys. Lett. 96 241110
[22] Pendry J B, Schurig D, Smith D R 2006 Science 312 1780
[23] Xu X H, Wu X, Xiao S Q, Gan Y H, Wang B Z 2013 Acta Phys. Sin. 62 084101 (in Chinese) [徐新河, 吴夏, 肖绍球, 甘月红, 王秉中 2013 62 084101]
[24] Wang J F, Zhang J Q, Ma H, Yang Y M, Wu X, Qu S B, Xu Z, Xia S 2010 Acta Phys. Sin. 59 1851 (in Chinese) [王甲富, 张介秋, 马华, 杨一鸣, 吴翔, 屈绍波, 徐卓, 夏颂 2010 59 1851]
[25] Kats A V, Savel’ev S, Yampol’skii V A, Nori1 F 2007 Phys. Rev. Lett. 98 073901
[26] Zhang H F, Cao D, Tao F, Yang X H, Wang Y, Yan X N, Bai L H 2010 Chin. Phys. B 19 027301
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