High-efficiency tunable T-shaped beam splitter based on one-way waveguide

Lujun Hong, Sanshui Xiao*, Xiaohua Deng, Rongqiang Pu, Linfang Shen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Power splitters have been widely studied in the fields of radio frequency and integrated photonics, however, conventional splitters generally suffer from poor transmission and limited bandwidth. Here we propose a novel tunable T-shaped power splitter utilizing one-way waveguide that is composed by the yttrium–iron–garnet–air–metal configuration with one static magnetic field applied. We show that the transmission efficiency of such a splitter reaches 100% in the lossless case due to the suppression of reflection by the one-way waveguide. By introducing a defect in the junction area, the splitting ratio of the splitter can be gradually tuned by varying the external magnetic field, and large operation bandwidth can be achieved for a given splitting ratio. Our results presented here focus on the radio frequency, and the concept can easily be applied to the photonic area.
Original languageEnglish
Article number125002
JournalJournal of Optics
Issue number12
Number of pages7
Publication statusPublished - 2018


  • Surface plasmons
  • Waveguide
  • One-way waveguide
  • Power splitter


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