Design of Environmental Biosensor Based on Photonic Crystal Fiber with Bends Using Finite Element Method

Shyqyri Haxha (1) , Ahmed Teyeb (2) , Fathi Abdel Malek (3) , Emmanuel Kofi Akowuah (1) , Iyad Dayoub (4, 5)

1 University of Bedfordshire
2 ESPRIT - Ecole Supérieure Privée d'Ingénierie et de Technologies
3 UCAR - Université de Carthage (Tunisie)
4 IEMN-DOAE - Institut d’Électronique, de Microélectronique et de Nanotechnologie - Département Opto-Acousto-Électronique - UMR 8520
5 COMNUM - IEMN - COMmunications NUMériques - IEMN

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.

Mots clés: Biosensors; Photonic Crystal Fibres Sensor; Nanosensor; Finite Element Method

Domaines: Optique [physics.optics]; Ingénierie de l'environnement

Shyqyri Haxha, Ahmed Teyeb, Fathi Abdel Malek, Emmanuel Kofi Akowuah, Iyad Dayoub. Design of Environmental Biosensor Based on Photonic Crystal Fiber with Bends Using Finite Element Method. Optics and Photonics Journal, 2015, 05 (03), pp.69-78. ⟨10.4236/opj.2015.53006⟩. ⟨hal-03383011⟩