Design of silica-based photonic crystal fiber for biosensing applications |
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Authors: | L Mescia F Prudenzano L Allegretti G Calò M De Sario A D’Orazio L Maiorano T Palmisano V Petruzzelli |
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Institution: | 1. Dipartimento di Elettrotecnica ed Elettronica, Politecnico di Bari Via E. Orabona 4 – 70125 Bari, Italy;2. Dipartimento di Ingegneria dell’Ambiente e per lo Sviluppo Sostenibile, Politecnico di Bari Viale del Turismo 8 – 74100 Taranto, Italy |
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Abstract: | In this paper, the design of a new photonic crystal fiber sensor for methadone detection in water is reported. The sensor feasibility is numerically demonstrated via accurate simulations performed by employing a Finite Element Method (FEM) numerical code. The fiber cross section, including a polymeric cladding as sensitive layer, is optimized. In particular, the sensor refinement is obtained via a large number of simulations performed by varying the thickness of the polymeric layer, the hole diameter, the hole-to-hole spacing and the transversal distribution of the holes. The simulation results suggest that a suitable fiber cross section design can enhance the evanescent field interaction with the polymeric layer permeated by the analyte. |
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