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利用不均匀材料提出了一种折射率正负梯度交替表面, 并利用几何光学法和电磁场数值仿真方法对其机理进行了研究与验证, 发现其可以操控电磁波的传播: 在一定的参数下, 其可以将空间中的入射电磁波一直束缚在介质中, 或在介质中传播一定距离后再实现电磁波的释放; 同时该结构具有宽带、极化无关等特性. 利用该结构可引导能流, 减小后向散射截面, 可用作隐身表面.
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关键词:
- 折射率正负梯度交替表面 /
- 几何光学法 /
- 隐身表面
In this paper, we design a kind of positive and negative gradient refractive index alternating surface and discuss its physical mechanism by the geometrical optics method and the numerical simulation of electromagnetic field. This structure can control the propagation of electromagnetic waves by adjusting some parameters such as refractive gradient. Under certain parameters, electromagnetic waves from space can be confined mainly in the media all the time, or are released into the space after propagating a certain distance in the media. This structure is polarization-independent and wide-band. It means that this structure can be used as a stealth surface by reducing the scattering cross section. Finally, the characteristics of the structure are verified by the numerical simulation.-
Keywords:
- positive and negative gradient refractive index alternant surface /
- geometrical optics method /
- stealth surface
[1] Pendry J B, Schurig D, Smith D R 2006 Science 312 1780
[2] Cummer S A, Popa B I, Schurig D, Smith D R 2006 Phys. Rev. E 74 036621
[3] Ma H, Q S B, Xu Z, Zhang J Q, Wang J F 2009 Chin. Phys. B 18 179
[4] Kwon D H, Werner D H 2008 Appl. Phys. Lett. 92 013505
[5] Jiang W, Cui T, Yu G, Lin X, Cheng Q, Chin J 2008 J. Phys. D: Appl. Phys. 41 085504
[6] Rahm M, Schurig D, Roberts D A, Cummer S A, Smith D R, Pendry J B 2008 Photon. Nanostruct: Fundam. Appl. 6 87
[7] Gu C, Qu S B, Pei Z B, Xu Z, Liu J, Gu W 2011 Acta Phys. Sin. 60 027801 (in Chinese) [顾超, 屈绍波, 裴志斌, 徐卓, 刘嘉, 顾巍 2011 60 027801]
[8] Alu A, Engheta N 2005 Phys. Rev. E 72 016623
[9] Alu A, Engheta N 2007 Opt. Express 15 3318
[10] Silverinha M G, Alu A, Engheta N 2007 Phys. Rev. E 75 036603
[11] 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 63 084103]
[12] Liu X B, Shi H Y, Chen B, Xu Z, Zhang A X 2014 Acta Phys. Sin. 63 214201 (in Chinese) [刘晓波, 施宏宇, 陈博, 徐卓, 张安学 2014 63 214201]
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[1] Pendry J B, Schurig D, Smith D R 2006 Science 312 1780
[2] Cummer S A, Popa B I, Schurig D, Smith D R 2006 Phys. Rev. E 74 036621
[3] Ma H, Q S B, Xu Z, Zhang J Q, Wang J F 2009 Chin. Phys. B 18 179
[4] Kwon D H, Werner D H 2008 Appl. Phys. Lett. 92 013505
[5] Jiang W, Cui T, Yu G, Lin X, Cheng Q, Chin J 2008 J. Phys. D: Appl. Phys. 41 085504
[6] Rahm M, Schurig D, Roberts D A, Cummer S A, Smith D R, Pendry J B 2008 Photon. Nanostruct: Fundam. Appl. 6 87
[7] Gu C, Qu S B, Pei Z B, Xu Z, Liu J, Gu W 2011 Acta Phys. Sin. 60 027801 (in Chinese) [顾超, 屈绍波, 裴志斌, 徐卓, 刘嘉, 顾巍 2011 60 027801]
[8] Alu A, Engheta N 2005 Phys. Rev. E 72 016623
[9] Alu A, Engheta N 2007 Opt. Express 15 3318
[10] Silverinha M G, Alu A, Engheta N 2007 Phys. Rev. E 75 036603
[11] 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 63 084103]
[12] Liu X B, Shi H Y, Chen B, Xu Z, Zhang A X 2014 Acta Phys. Sin. 63 214201 (in Chinese) [刘晓波, 施宏宇, 陈博, 徐卓, 张安学 2014 63 214201]
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