Abstract

In this paper, we propose two novel and simple designs for photonic-crystal-fiber-based polarization filters, which consist of a gold rod and gold ring at the center. The performance characteristics of both the designs are analyzed by using the finite element method. Surface plasmon resonance is induced through the coupling mechanism when the phase-matching condition is achieved. Bandwidth performance of the gold rod model is evaluated by varying the diameter of the two small air holes near the fiber core, whereas the same is done for the gold ring model by varying the thickness of the gold ring. From the simulation results, it can be inferred that the proposed filter structure achieved high bandwidth up to 1000 nm over the communication bands.

© 2019 Optical Society of America

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