提出并数值分析了基于混合表面等离子激元(HSPPs)的新型金属-介质-金属(MDM)波导，这种波导是由介质纳米线两侧的金属三角楔形结构构成。在通信波长1.55 mm 情形下，基于有限元方法(FEM)进行了分析和数值计算，计算结果表明光波能够被限制在超深亚波长区域，并且相比于没有三角楔形的波导结构具有更长的传播长度。更进一步的研究显示出该三角形半导体波导具有尖端增强效应，在三角楔形的顶角为120°时，其传播长度提高了18%且模式面积减小为原来的65%，因此这种混合表面等离子激元波导可应用于激光器、耦合器以及光子集成电路的设计中。

A novel metal-dielectric-metal (MDM) waveguide based on the hybrid surface plasmonic polaritons (HSPPs) is proposed and numerically analyzed. This waveguide consists of two metal triangle wedge is placed on both sides of dielectric nanowires. Analytical and numerical calculations based on the finite element method (FEM) are carried out at the telecommunication wavelength λ = 1.55 μm . The numerical results show that it can confine light in the ultra-deep-subwavelength region with long propagation distance relative to the distance in the MDM waveguide without metal triangle. Detailed study of this structure reveals that these advantages originate from the tip enhancement of the triangle semiconductor waveguide. At 120°, its propagation distance increase 18% and mode area decrease 65%. So various applications will benefit from the hybrid plasmonic polariton waveguides, such as the laser, coupler and photonic integrated circuits.