Propagation characteristics of the supermode based on two coupled semi-infinite rib plasmonic waveguides

被引：27

作者：

Chang, Sheng Hsiung

Chiu, Tsen Chieh

Tai, Chao-Yi

机构：

[1] Natl Cent Univ, Dept Elect Engn, Jhongli 32001, Taiwan

[2] Natl Cent Univ, Dept Opt & Photon, Jhongli 32001, Taiwan

来源：

OPTICS EXPRESS | 2007年 / 15卷 / 04期

关键词：

D O I：

10.1364/OE.15.001755

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the propagation characteristics of a plasmonic waveguide structure based on two coupled rectangular wedges. Dispersion, propagation loss, and field distributions are investigated by three-dimensional finite-difference time-domain method. The considered structure supports only one supermode over 30THz bandwidth, and the calculated propagation loss at lambda=1.55 mu m is 0.0257dB/mu m, which is lower than the existing report by 1.7 times while keeping comparable field localizations. The all-planar structure in conjunction with the linearly dispersive characteristic over a wide operational bandwidth signifies its great potential for optical signal transporting in nanophotonic circuits. (c) 2007 Optical Society of America.

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页码：1755 / 1761

页数：7

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