激光与光电子学进展, 2020, 57 (19): 192302, 网络出版: 2020-09-27
太赫兹金属平行平板波导TE1模式有效折射率的近似表达式 下载: 1104次
Approximate Formula for Effective Refractive Index of TE1 Mode in Terahertz Parallel-Plate Metal Waveguides
摘要
对太赫兹金属平行平板波导的最低阶横电(TE1)模式进行理论研究,并且在真实金属参数的条件下,推导出一个适用于太赫兹金属平行平板波导TE1模式有效折射率的近似表达式。首先对TE1模式进行基于有限元方法的数值模拟,并且将模拟结果与近似表达式所得的数值进行对比,验证理论推导的可行性。接着由误差分析表明所推导的近似表达式在整个太赫兹波段具有很高的精确度,并且具有适用频率范围广的特点。模拟仿真结果表明,该近似表达式对TE1模式的分析具有高度的适用性,将对金属平行平板波导的研究和应用起到一定的促进作用。
Abstract
This paper describes a theoretical study of the lowest-order transverse electric (TE1) mode of a terahertz parallel-plate metal waveguide, and an approximate expression for the effective refractive index of the TE1 mode of the terahertz parallel-plate metal waveguide is derived under the condition of real metal parameters. First, the TE1 mode is numerically simulated based on the finite element method, and the simulation results are compared with the values obtain from the approximate expressions to verify the feasibility of the theoretical derivation. The error analysis shows that the deduced approximate expression has high accuracy in the entire terahertz band and exhibits the characteristics of a wide range of applicable frequencies. Simulation results show that this approximate expression has a high degree of applicability to the analysis of the TE1 mode and will promote the research and application of parallel-plate metal waveguides.
李哲, 滕达, 白丽华, 曹清. 太赫兹金属平行平板波导TE1模式有效折射率的近似表达式[J]. 激光与光电子学进展, 2020, 57(19): 192302. Zhe Li, Da Teng, Lihua Bai, Qing Cao. Approximate Formula for Effective Refractive Index of TE1 Mode in Terahertz Parallel-Plate Metal Waveguides[J]. Laser & Optoelectronics Progress, 2020, 57(19): 192302.