Zhang Jingjing, Luo Yu, Mortensen Niels Asger
DTU Fotonik - Department of Photonics Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.
Opt Express. 2010 Feb 15;18(4):3864-70. doi: 10.1364/OE.18.003864.
We propose a method of tunneling electromagnetic (EM) waves through a channel with sub-wavelength cross section. By filling the channel with high-epsilon isotropic material and implementing two matching layers with uniaxial metamterial substrates, the guided waves can go through the narrow channel without being cut off, as if it has just passed through the original empty waveguide. Both the magnitude and phase information of the EM fields can be effectively restored after passing this channel, regardless of the polarization of the incoming wave. The performance of this sub-wavelength channel, which is designed with coordinate transformation methodology, is studied theoretically and numerically.
我们提出了一种使电磁波隧穿通过具有亚波长横截面通道的方法。通过用高介电常数各向同性材料填充该通道并使用单轴超材料基板实现两个匹配层，导波可以穿过狭窄通道而不会被截断，就好像它刚刚穿过原始的空波导一样。无论入射波的极化如何，电磁场的幅度和相位信息在通过该通道后都可以有效地恢复。利用坐标变换方法设计的这种亚波长通道的性能在理论和数值上进行了研究。
