金属多包层波导的红外传输特性

doi:10.3969/j.issn.1007-5461.2023.05.018

量子电子学报 ›› 2023, Vol. 40 ›› Issue (5): 789-797.doi: 10.3969/j.issn.1007-5461.2023.05.018

金属多包层波导的红外传输特性

唐艳妮 , 王燕 *, 阎晓娜 , 张惠芳

( 上海大学理学院, 上海 200444 )

收稿日期:2021-06-08 修回日期:2021-08-10 出版日期:2023-09-28 发布日期:2023-09-28
通讯作者: E-mail: yanwang@staff.shu.edu.cn E-mail:E-mail: yanwang@staff.shu.edu.cn
作者简介:唐艳妮 ( 1995 - ), 女, 陕西渭南人, 研究生, 主要从事波导光学方面的研究。E-mail: 1748716361@qq.com
基金资助:
国家自然科学基金(11175045)

Infrared transmission characteristics of metal multi⁃clad waveguides

TANG Yanni , WANG Yan *, YAN Xiaona , ZHANG Huifang

( College of Sciences, Shanghai University, Shanghai 200444, China )

Received:2021-06-08 Revised:2021-08-10 Published:2023-09-28 Online:2023-09-28

摘要/Abstract

摘要： 利用高斯光束激励一个非对称的五层金属波导结构，分析了其传输特性和透射谱。首先，数值求解了该波导的本征方程得到波导支持的模式类型以及各模式的截止情况。进而利用高斯光束激励该波导，根据高斯光束的角谱分布和模式耦合效率得到不同模式的振幅表达式，并通过场分布方程得到出射口的平均功率流密度从而得到透射谱。研究结果显示当中心层介质折射率每增加0.02，透射谱的极大值和极小值对应波长的相对距离偏移可达 35 nm，表明该波导可用于探测中心介质的传感器，为波导在传感探测方面的应用提供了理论参考。

关键词: 纤维与波导光学, 高斯光, 透射谱, 传感器

Abstract: The transmission characteristics and transmission spectrum of a five-layer metal waveguide structure were studied under the excitation of a Gaussian beam. Firstly, the eigen equation of the waveguide were numerically solved to obtain the types and field distributions of the modes supported by the waveguide. Furthermore, assuming that the waveguide was excited by a Gaussian beam, the amplitude expressions of the different modes were calculated according to the angular spectrum distribution of the Gaussian beam and the mode coupling efficiency, and the transmission spectrum was obtained through the average power flow density at the outlet. It is found that when the refractive index of the central layer is increased by every 0.02, the minimum value of transmission spectrum shifts 35 nm each time, indicating that the waveguide can be used in a sensor for detecting central medium. The research will provide a theoretical reference for the application of waveguides in sensors and dielectric detectors.

Key words: fiber and waveguide optics, Gaussian light, transmission spectrum, sensors

中图分类号:

TN252

唐艳妮 , 王燕 , 阎晓娜 , 张惠芳. 金属多包层波导的红外传输特性[J]. 量子电子学报, 2023, 40(5): 789-797.

TANG Yanni , WANG Yan , YAN Xiaona , ZHANG Huifang. Infrared transmission characteristics of metal multi⁃clad waveguides[J]. Chinese Journal of Quantum Electronics, 2023, 40(5): 789-797.

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金属多包层波导的红外传输特性

Infrared transmission characteristics of metal multi⁃clad waveguides

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