Laser & Optoelectronics Progress, Volume. 56, Issue 19, 192302(2019)
Cos-Gaussian Beams Propagating Inside Terahertz Parallel-Plate Waveguides
Herein, based on the TE1 mode theory of the parallel-plate waveguide and assumption of approximately linearly polarized electric fields, we derive the expression of electric-field propagation of a cos-Gaussian beam in the parallel-plate waveguide. Under the paraxial approximation, the cos-Gaussian beam can be used as a fundamental solution for parallel-plate waveguides. The derived beam is tested by numerical simulation in copper parallel-plate waveguides at a frequency of 0.35 THz. Results show that the simulated amplitude and phase are in good agreement with those from the analytical expression of electric field. The deviation between the simulated phase and theoretical results at the z-axis and completeness of the electric-field divergence equation are also discussed.
Get Citation
Copy Citation Text
Dengming Wu, Da Teng, Qing Cao, Lihua Bai, Zhe Li. Cos-Gaussian Beams Propagating Inside Terahertz Parallel-Plate Waveguides[J]. Laser & Optoelectronics Progress, 2019, 56(19): 192302
Category: Optical Devices
Received: Mar. 11, 2019
Accepted: Apr. 17, 2019
Published Online: Oct. 14, 2019
The Author Email: Teng Da (tengda@zznu.edu.cn), Cao Qing (qcao@shu.edu.cn)