Surface Plasmon Resonance-Based Silicon Dual-Core Photonic Crystal Fiber Polarization Beam Splitter at Mid-Infrared Spectral Region

Research output: Contribution to journalArticlepeer-review



  • Yuwei Qu
  • Jinhui Yuan
  • Xian Zhou
  • Feng Li
  • Binbin Yan
  • Qiang Wu
  • Kuiru Wang
  • Xinzhu Sang
  • Keping Long
  • Chongxiu Yu

External departments

  • Beijing University of Posts and Telecommunications
  • University of Science and Technology Beijing
  • The Hong Kong Polytechnic University
  • Hong Kong Polytechnic University


Original languageEnglish
Pages (from-to)2221-2230
JournalJournal of the Optical Society of America B: Optical Physics (JOSA B)
Issue number8
Early online date7 Jul 2020
Publication statusPublished - 1 Aug 2020
Publication type

Research output: Contribution to journalArticlepeer-review


In this paper, a novel silicon dual-core photonic crystal fiber (Si-DC-PCF) polarization beam splitter (PBS) based on surface plasmon resonance effect is proposed. The mode coupling characteristics between the X and Y-polarized even and odd modes and surface plasmon polariton mode are analyzed by using the finite element method and coupled-mode theory. The influences of the structure parameters of the Si-DC-PCF on the coupling length and coupling length ratio are investigated. The normalized output power of the X and Y-polarized modes in the cores A and B and the corresponding extinction ratio are also discussed. By optimizing the structure parameters of the Si-DC-PCF, the PBS length of 192 μm and bandwidth of 830 and 730 nm in the cores A and B are achieved. It is believed that the proposed Si-DC-PCF PBS can find important applications in the mid-infrared laser and sensing systems.