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Plasmonics

, Volume 14, Issue 6, pp 1725–1733 | Cite as

A Novel Polarization Filter Based on Photonic Crystal Fiber with a Single Au-Coated Air Hole and Semi-Hourglass Structure

  • Xingtao Zhao
  • Lu HuaEmail author
  • Guohui Jiang
  • Jirui Cheng
  • Qiang Xiong
Article
  • 56 Downloads

Abstract

A polarization filter that has a novel photonic crystal fiber structure of semi-hourglass part and Au-coated film is proposed. We simulated the performance of the structure by the finite element method. The numerical simulation results show that altering the structure parameters and the thickness of Au film can lead to an optimal parameter combination with remarkable features, owing to the semi-hourglass part that induced huge asymmetry factor into the structure. On the one hand, when the thickness of Au film is controlled to be 18.7 nm, we can get the confinement loss 1304.02 dB/cm and 3.96 dB/cm on y-polarization and x-polarization respectively at λ = 1.55 μm. On the other hand, controlling the thickness to 35 nm, the confinement loss on y-polarization and x-polarization is 848.87 dB/cm and 1.31 dB/cm respectively at λ = 1.31 μm. In addition, the bandwidth with crosstalk smaller than − 20 dB is 680 nm and 800 nm at λ = 1.55 μm and 1.31 μm, respectively, when the fiber length is 500 μm. This structure, as a reference, can provide a new idea when designing a photonic crystal fiber structure applied in optical communication and sensor system.

Keywords

Photonic crystal fiber Polarization filter Au-coated Surface plasmon resonance Fiber design 

Notes

Funding

This study was funded by National Science Foundation (NSF) (61405172, 61640408) and Natural Science Foundation of Hebei (F2018203346).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Electrical EngineeringYanshan UniversityQinghuangdaoChina

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