Institute of Semiconductors, Chinese Academy of Sciences, Beijing, China.
Opt Lett. 2011 Jun 15;36(12):2312-4. doi: 10.1364/OL.36.002312.
In this Letter, we propose a hybrid plasmonic nanosystem consisting of a silver cladding layer with a semicylinder bump on top of InGaAsP nanowire. Because of the coupling between the dielectric waveguide mode and surface plasmon polariton mode, the hybrid plasmonic mode can exhibit low loss with strong field localization. The finite element method numerical simulations are employed to evaluate the performances of the hybrid mode. In order to achieve the lossless propagation of the hybrid mode with the mode area of 0.0058(λ²/4) at 1.55 μm, the material gain of 200 nm × 300 nm InGaAsP nanowire should reach 1223 cm⁻¹.
在这封信件中，我们提出了一种混合等离子体纳米系统，由顶部带有半圆柱凸起的银包层和 InGaAsP 纳米线组成。由于介波导模式和表面等离子体激元模式之间的耦合，混合等离子体模式可以表现出低损耗和强场局域化。采用有限元方法数值模拟来评估混合模式的性能。为了实现损耗为零、模式面积为 0.0058(λ²/4)、在 1.55 μm 处的混合模式的无损耗传输，200nm×300nm 的 InGaAsP 纳米线的材料增益应达到 1223cm⁻¹。
