Optical Asymmetric filter Using Graphene Plasmonic embedded in Photonic Crystal Fiber

This work exhibits simulation and design of a small-scale graphene plasmonic filter based photonic crystal fiber through finite element method investigation. Some cladding holes inside the PCF possess deposited 2-D graphene enabling the light transmission interaction which leads to surface plasmonic resonance (SPR). Improved optical filter performance results from this process because it enables better control and higher sensitivity and reduced signal loss so filters become optimal for use. A finite element method analyzes both polarization properties and spectral loss performance in the proposed structural design. The simulation evaluation was divided into two testing periods while changing the dimensions of PCF geometry. The investigation of first design components incorporated r = 6 and r = 5 while the second design components incorporated r = 6 and r = 7. The introduction of graphene materials into PCF rings comprises the two design models progressively from one to four rings. The design suffered maximum loss when four graphene rings were inserted in both designs. The absorption increases results in the creation of plasmonic polaritons. In the first design, when r = 6 and r = 5, the quasi-TE guided mode exhibits losses of -113000 dB/ mm for wavelengths λ = 1.14 μm. The quasi-TM guided mode exhibits losses of -109100 dB/ mm for wavelengths λ = 1.17 μm . In the second design, r = 6 and r = 7, the losses of the quasi-TE guided mode are -146800 dB/ mm for wavelengths λ = 1.16 μm. The quasi-TM guided mode exhibits losses of -146600 dB/mm at wavelengths λ = 1.2 μm.