TITLE:
Design of Environmental Biosensor Based on Photonic Crystal Fiber with Bends Using Finite Element Method
AUTHORS:
Shyqyri Haxha, Ahmed Teyeb, Fathi Abdel Malek, Emmanuel Kofi Akowuah, Iyad Dayoub
KEYWORDS:
Biosensors, Photonic Crystal Fibres Sensor, Nanosensor, Finite Element Method
JOURNAL NAME:
Optics and Photonics Journal,
Vol.5 No.3,
March
20,
2015
ABSTRACT: In this
paper, a biosensor based on photonic crystal fiber (PCF) is proposed and
designed using Full-Vectorial Finite Element Method (FVFEM). The proposed PCF
sensor consists of three concentric circles surrounding the core. The key
optical sensor characteristics such as sensitivity, the field profiles and real
part of the refractive index of the proposed PCF structure are investigated by
employing the FVFEM. The proposed sensor can be deployed for environmental
sensing when the PCF active region is filled with either analytes such as
liquids or gas. By careful selection of the design parameters such as the
radius of the sensing circle, the diameter of air holes in the core region and
hole to hole spacing, Λ, the sensitivity analytes is determined. Our simulation
results show that, the electric field distribution is primary localized in the
third concentric circle with a radius of 16 μm. Effects of PCF bending on the
sensitivity is also studied and reported.