Near-field investigations of surface plasmon polaritons on metamaterials in the terahertz frequency range

该项目旨在对表面等离子激元在特定设计的元表面上的空间传播和侧向约束进行理论和实验研究。通过对超材料的合理设计，可以完全控制表面等离子激元在超表面平面上的空间传播。基于三维数值模型计算了表面等离激元极化子的传播。在对完成的元表面设计进行了成功的数值评估后，采用微纳米制造方法制造了元表面，并用空间分辨太赫兹近场光谱测量了表面等离子体激元的传播。

The project aims at the theoretical and experimental investigation of the spatial propagation and lateral confinement of surface plasmon polaritons on specifically designed meta-surfaces. By judicious design of the metamaterial, complete control over the spatial propagation of surface plasmon polaritons in the plane of the meta-surface shall be achieved. The propagation of the surface plasmon polaritons is calculated based on three-dimensional numerical models. After successful numerical evaluation of the accomplished meta-surface designs, the meta-surfaces are fabricated by micro- and nano-fabrication methods and the propagation of surface plasmon polaritons is measured by spatially resolved terahertz near-field spectroscopy.