基于黄金分割比的长程介质加载表面等离子激元波导传输特性研究（英文）

发布时间：2018-06-30 07:42

  本文选题：集成光学 + 表面等离子激元波导　； 参考：《激光与光电子学进展》2016年06期

【摘要】：提出了一种基于黄金分割比的新型长程介质加载表面等离子激元波导(LR-DLSPPW)结构,在通信波长λ0=1.55μm情形下,运用有限元法对这种波导基模的归一化电场分布、模式有效折射率、衰减常数、传播长度、模式宽度、品质因数和耦合长度等传输特性参数进行了仿真分析计算。结果表明:与不具有黄金分割比的类似波导相比,基于黄金分割比的LR-DLSPPW具有较长的传播长度1.36mm和较小的模式宽度1.35μm;当介质脊面积保持为0.9μm2不变且介质脊高宽比值取为黄金分割比时,其品质因数会出现一个超过6.15×105的最大值。此外,当相邻波导之间的间隔超过3μm时,相邻波导间的串扰可被忽略。显然,这种基于黄金分割比的新型波导结构能够很好地应用于高密度光子集成回路的设计中。
[Abstract]:A new type of long-range dielectric loaded surface plasmon waveguide (LR-DLSPPW) structure based on golden section ratio is proposed. The normalized electric field distribution and mode effective refractive index of the fundamental modes of the waveguide are obtained by using finite element method under the communication wavelength 位 _ 0 ~ (1.55) 渭 m. The transmission characteristic parameters, such as attenuation constant, propagation length, mode width, quality factor and coupling length, are simulated and calculated. The results show that compared with similar waveguides without golden section ratio, The LR-DLSPPW based on golden section ratio has a long propagation length 1.36mm and a smaller mode width of 1.35 渭 m, and when the medium ridge area remains 0.9 渭 m ~ 2 and the ratio of height to width of the medium ridge is taken as the golden section ratio, the quality factor of LR-DLSPPW will have a maximum value of more than 6.15 脳 10 ~ 5. Furthermore, when the interval between adjacent waveguides exceeds 3 渭 m, the crosstalk between adjacent waveguides can be neglected. It is obvious that this new waveguide structure based on golden section ratio can be well applied to the design of high density photonic integrated circuit.
【作者单位】： 兰州大学信息科学与工程学院现代通信技术研究所;
【基金】：中央高校基本科研业务费专项资金(lzujbky-2012-40;lzujbky-2015-K7)
【分类号】：TN252
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本文编号：2085535