Gao Zhen, Wang Zhuoyuan, Zhang Baile
Opt Lett. 2018 Jan 1;43(1):50-53. doi: 10.1364/OL.43.000050.
It has been recently reported that the unit cell of wire media metamaterials can be tailored locally to shape the flow of electromagnetic waves at deep-subwavelength scales [Nat. Phys.9, 55 (2013)NPAHAX1745-247310.1038/nphys2480]. However, such bulk structures have a thickness of at least the order of wavelength, thus hindering their applications in the on-chip compact plasmonic integrated circuits. Here, based upon a Sievenpiper "mushroom" array [IEEE Trans. Microwave Theory Tech.47, 2059 (1999)IETMAB0018-948010.1109/22.798001], which is compatible with standard printed circuit board technology, we propose and experimentally demonstrate the subwavelength manipulation of surface waves on a thin surface-wave bandgap crystal with a thickness much smaller than the wavelength (1/30th of the operating wavelength). Functional devices including a T-shaped splitter and sharp bend are constructed with good performance.
最近有报道称，线介质超材料的晶胞可以在局部进行定制，以在深亚波长尺度上塑造电磁波的传播[《自然·物理学》9, 55 (2013年)NPAHAX1745 - 247310.1038/nphys2480]。然而，这种块状结构的厚度至少为波长量级，因此阻碍了它们在片上紧凑型等离子体集成电路中的应用。在此，基于与标准印刷电路板技术兼容的西文派珀“蘑菇”阵列[《IEEE微波理论与技术汇刊》47, 2059 (1999年)IETMAB0018 - 948010.1109/22.798001]，我们提出并通过实验证明了在厚度远小于波长（工作波长的1/30）的薄表面波带隙晶体上对表面波进行亚波长操纵。构建了包括T形分离器和尖锐弯曲在内的功能器件，性能良好。
