Hybrid Plasmonics Slot THz Waveguide for Subwavelength Field Confinement and Crosstalk between Two Waveguides

Jing Xiao, Qi-Qin Wei, Duo Guo Yang, Ping Zhang, Ning He, Guo Qi Zhang, Xian Ping Chen

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)
28 Downloads (Pure)

Abstract

The slot waveguide has attracted considerable attention because of its ability to confine and guide electromagnetic energy at the subwavelength scale beyond the diffraction limit. We propose a novel terahertz slot waveguide structure to achieve a better tradeoff between propagation length and field confinement capacity, the novel waveguide consisting of a two slot structure. The performances of terahertz waveguides were investigated using the finite-element method. The results demonstrated that the hybrid slot waveguide (HSW) provides significantly enhanced field confinement in low index slot regions: more than five times that of traditional low index slot waveguides (LISWs). An optimized HSW structure was achieved by tuning the tradeoff between mode confinement and propagation length. We also showed that its integration in conventional planar waveguide circuits was greatly improved compared with the LISWs, by comparing their crosstalk. The proposed new HSW structure has great potential to enable THz production of compact integration and could lead to true semiconductor-basedTHz applications with high performance.

Original languageEnglish
Article number7811186
JournalIEEE Journal of Selected Topics in Quantum Electronics
Volume23
Issue number4
DOIs
Publication statusPublished - 9 Jan 2017

Keywords

  • crosstalk
  • enhanced field
  • propagation length
  • slot THz waveguide
  • Terahertz radiation

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