A numerical analysis of a novel birefringent photonic crystal fiber (PCF) biosensor\ud
constructed on the surface plasmon resonance (SPR) model is presented in this paper.\ud
This biosensor configuration utilizes circular air holes to introduce birefringence into\ud
the structure. This PCF biosensor model shows promise in the area of multiple detection\ud
using HEx\ud
11 and HEy\ud
11 modes to sense more than one analyte. A numerical study of the biosensor\ud
is performed in two interrogation modes: amplitude and wavelength. Sensor resolution\ud
values with spectral interrogation yielded 5 10 5 RIU (refractive index units) for\ud
HEx\ud
11 modes and 6 10 5 RIU for HEy\ud
11 modes, whereas 3 10 5 RIU for HEx\ud
11 modes\ud
and 4 10 5 RIU for HEy\ud
11 modes are demonstrated for the amplitude interrogation
In this paper, we report a design of high sensitivity Photonic Crystal Fiber (PCF) sensor with high birefringence and low confinement losses for liquid analyte sensing applications. The proposed PCF structures are designed with supplementary elliptical air holes in the core region vertically-shaped V-PCF and horizontally-shaped H-PCF. The full vectorial Finite Element Method (FEM) simulations performed to examine the sensitivity, the confinement losses, the effective refractive index and the modal birefringence features of the proposed elliptical air hole PCF structures. We show that the proposed PCF structures exhibit high relative sensitivity, high birefringence and low confinement losses simultaneously for various analytes.
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