Designand numerical analysis of a photonic crystal fiber (PCF)-based flattened dispersion THz waveguide.

Author:- Rayhan Habib Jibon, Abdullah Al-Mamun Bulbul, Abdullah Nahid, Osama S. Faragallah, Mohammed Baz, Mahmoud M. A. Eid, Ahmed Nabih zaki Rashed
Category:- Journal; Year:- 2021
Discipline:- Electronics and Communication Engineering Discipline
School:- Science, Engineering & Technology School


A novel PCF-based sensor has been presented in this paper to sense different chemicals and biocomponents. The proposed biochemical sensor (BCS) comprises a simple arrangement of rectangular holes. The competence of this BCS in detecting analytes is evaluated employing the full-vector finite element method (FEM). Performance metrics prove the competence of this BCS in sensing various analytes that have a refractive index in the range of 1.33–1.48. The proposed BCS shows ultralower values for both the bulk absorption and confinement loss. This BCS attains a maximum of about 95.82% relative sensitivity at 2.5 THz. Also, the dispersion for this sensor is only 0.12 ± 0.011 ps/THz/cm at the same point of interest. These results prove that the proposed BCS will play a key role in sensing toxic chemicals, illegal drugs, biocomponents, etc. Besides, the simple rectangle-based PCF structure ensures the feasibility of fabrication by practicing the existing fabrication strategies.

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