Laser & Optoelectronics Progress, Volume. 57, Issue 19, 192302(2020)
Approximate Formula for Effective Refractive Index of TE1 Mode in Terahertz Parallel-Plate Metal Waveguides
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.
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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
Category: Optical Devices
Received: Dec. 14, 2019
Accepted: Feb. 14, 2020
Published Online: Sep. 27, 2020
The Author Email: Teng Da (tengda@zznu.edu.cn)