使用锥形平行板波导改善太赫兹耦合

Improvement of THz coupling using a tapered parallel-plate waveguide.

作者信息

Kim Sang-Hoon, Lee Eui Su, Ji Young Bin, Jeon Tae-In

机构信息

Division of Electrical and Electronics Engineering, Korea Maritime University, Busan, South Korea.

出版信息

Opt Express. 2010 Jan 18;18(2):1289-95. doi: 10.1364/OE.18.001289.

DOI:10.1364/OE.18.001289

PMID:20173954

Abstract

This paper reports an experimental and simulation study of a tapered parallel-plate waveguide (TPPWG) to improve THz coupling to the plate separation gap. The flat- and round-type TPPWG without any silicon lens is compared to the parallel-plate waveguide (PPWG) with a plano-cylindrical silicon lens. The spectrum amplitudes of the input-side TPPWG and the input- and output-side TPPWG both having a 3 degrees slop angle increased about 56% and 103% at 1 THz when compared to that of the PPWG. Since the input- and output-side TPPWG had almost no impedance mismatch to the propagating THz wave, coupling to the waveguide could be improved twice compared with the PPWG.

摘要

本文报道了一项关于锥形平行板波导（TPPWG）的实验和模拟研究，以改善太赫兹波与板间距间隙的耦合。将没有任何硅透镜的平板型和圆形TPPWG与带有平圆柱硅透镜的平行板波导（PPWG）进行了比较。与PPWG相比，输入侧TPPWG以及输入和输出侧均具有3度倾斜角的TPPWG在1太赫兹时的频谱幅度分别增加了约56%和103%。由于输入和输出侧TPPWG与传播的太赫兹波几乎没有阻抗失配，因此与PPWG相比，与波导的耦合可以提高两倍。