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本文设计了一种柔性, 非定向低散射的1bit编码超表面, 实现了太赫兹宽频带雷达散射截面的缩减. 这种设计基于对“0”和“1”两种基本单元进行编码, 其反射相位差在很宽的频段范围内接近180°, 为一种非周期的排列方式, 该电磁超表面使入射的电磁波发生漫反射, 从而实现雷达散射截面的缩减. 全波仿真结果表明, 在垂直入射条件下, 编码超表面的镜像反射率低于-10 dB的带宽频段范围为1.0-1.4 THz, 该带宽内超表面相对同尺寸金属板可将雷达散射截面所减量达到10 dB以上, 最大缩减量达到19 dB. 把柔性编码表面弯曲在直径为4 mm的金属圆柱面上, 雷达散射截面的所减量高于10 dB以上的带宽频段范围为0.9-1.2 THz, 仍然可实现宽频带缩减特性. 总之, 编码超表面为调控太赫兹波提供一种新的途径, 将在雷达隐身、成像、宽带通信等方面具有重要的意义.
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[3] Shelby R A, Smith D R, Schultz S 2001 Science 292 77
[4] Xie L, Yao Y, Ying Y 2014 Appl. Spectrosc. Rev. 49 448
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[14] Li Y F, Zhang J Q, Qu S B, Wang J F, Chen H Y, Xu Z, Zhang A X 2014 Acta Phys. Sin. 63 084103 (in Chinese) [李勇峰, 张介秋, 屈绍波, 王甲富, 陈红雅, 徐卓, 张安学 2014 物理学报 63 084103]
[15] Chen J, Cheng Q, Zhao J, Cui T J 2014 Prog. Electromagn. Res. 146 71
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[18] Yang H H, Cao X Y, Gao J, Li W, Yuan Z, Shang K 2013 Prog. Electromagn. Res. 33 31
[19] Wang K, Zhao J, Cheng Q, Dong D S, Cui T J 2014 Sci. Rep. 4 5395
[20] Li Y F, Zhang J Q, Qu S B, Wang J F, Cheng H Y, Xu Z, Zhang A X 2014 Appl. Phys. Lett. 104 221110
[21] Li W H, Zhang J Q, Qu S B, Yuan H Y, Shen Y, Wang D J, Guo M C 2015 Acta Phys. Sin. 64 084101 (in Chinese) [李文惠, 张介秋, 屈绍波, 袁航盈, 沈杨, 王冬骏, 过勐超 2015 物理学报 64 084101]
[22] Cui T J, Qi M Q, Wan X, Zhao J, Cheng Q 2014 Light: Sci. Appl. 3 e218
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[1] Ferguson B, Zhang X C 2002 Nat.Mater. 1 26
[2] Tonouchi M 2007 Nat. Phontonics 1 97
[3] Shelby R A, Smith D R, Schultz S 2001 Science 292 77
[4] Xie L, Yao Y, Ying Y 2014 Appl. Spectrosc. Rev. 49 448
[5] Benz A, Krall M, Schwarz S, Dietze D, Detz H, Andrews A M, Schrenk W 2014 Sci. Rep. 4 1
[6] Nagatsuma T 2011 IEICE Electronic Exp. 8 1127
[7] Federici J, Moeller L 2010 J. Appl. Phys. 107 111101
[8] Alves F, Grbovic D, Kearney B, Karunasiri G 2012 Opt. Lett. 37 1886
[9] Iwaszczuk K, Strikwerda A C, Fan K, Zhang X, Averitt R D, Jepsen P U 2011 Opt. Express 20 635
[10] Hua H Q, Jiang Y S, He Y T 2014 Prog. Electromagn. Res. B 59 193
[11] Li S J, Cao X Yu, Gao J Z, Qiu R Z, Yi Y Q 2013 Acta Phys. Sin. 62 194101 (in Chinese) [李思佳, 曹祥玉, 高军, 郑秋容, 陈红雅, 赵一, 杨群 2013 物理学报 62 194101]
[12] Cheng C W, Abbas M N, Chiu C W, Lai K T, Shih M H, Chang Y C 2012 Opt. Express 20 10376
[13] Yang X M, Zhou X Y, Cheng Q, Ma H F, Cui T J 2010 Opt. Lett. 35 808
[14] Li Y F, Zhang J Q, Qu S B, Wang J F, Chen H Y, Xu Z, Zhang A X 2014 Acta Phys. Sin. 63 084103 (in Chinese) [李勇峰, 张介秋, 屈绍波, 王甲富, 陈红雅, 徐卓, 张安学 2014 物理学报 63 084103]
[15] Chen J, Cheng Q, Zhao J, Cui T J 2014 Prog. Electromagn. Res. 146 71
[16] Ye Y Q, Jin Y, He S L 2014 J. Opt. Soc. Am. B 27 498
[17] Wang F W, Gong S X, Zhang S, Mu X, Hong T 2012 Prog. Electromagn. Res. 25 248
[18] Yang H H, Cao X Y, Gao J, Li W, Yuan Z, Shang K 2013 Prog. Electromagn. Res. 33 31
[19] Wang K, Zhao J, Cheng Q, Dong D S, Cui T J 2014 Sci. Rep. 4 5395
[20] Li Y F, Zhang J Q, Qu S B, Wang J F, Cheng H Y, Xu Z, Zhang A X 2014 Appl. Phys. Lett. 104 221110
[21] Li W H, Zhang J Q, Qu S B, Yuan H Y, Shen Y, Wang D J, Guo M C 2015 Acta Phys. Sin. 64 084101 (in Chinese) [李文惠, 张介秋, 屈绍波, 袁航盈, 沈杨, 王冬骏, 过勐超 2015 物理学报 64 084101]
[22] Cui T J, Qi M Q, Wan X, Zhao J, Cheng Q 2014 Light: Sci. Appl. 3 e218
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