Abstract: The author proposes a two-dimensional grating structure on the gold film to achieve optical interconnects between quadruple optical fibers and waveguides of surface plasmon polaritons (SPPs). The structure is composed of four two-dimensional arc gratings of alignment. When the light strikes different structures, SPPs will be excited, focused and coupled to different waveguides, achieving optical interconnects between quadruple optical fibers and waveguides in the form of Equal, Butterfly and Perfect Shuffle Transformation respectively. The field distribution near the focal point is investigated with a simulation method based on Huygens-Fresnel principle and the experiment agrees well with the numerical simulation.

Key words: surface plasmon polariton, optical fiber, waveguide, interconnection

摘要： 利用在金膜上设计的4个直线排列的弧形二维光栅结构, 在实验上实现光纤与表面等离激元的四路光互联。当光纤照射到不同的弧形光栅上时, 将产生表面等离激元, 并被聚焦耦合到不同的波导中, 从而实现具有恒等、蝶形和全混洗3种方式的四路光纤与表面等离激元波导的光互联。在理论上, 利用惠更斯?菲涅尔原理进行数值模拟, 计算聚焦点附近的场强分布, 理论与实验结果符合得很好。

关键词: 表面等离激元, 光纤, 波导, 互联