Sensing performance of Fano resonance induced by the coupling of two 1D topological photonic crystals
Zain Elabdeen A. Mohamed, Sayed Elshahat, Alaa M. Abd‐Elnaiem, Mohamed Almokhtar
Abstract
Abstract In this work, a realized Fano resonance due to the coupling between two 1DTPC is proposed for refractive index sensing with an ultra-high-quality factor of 10 6 . The generated Fano can be assigned to the coupling between topological edge states of two 1D TPCs. The resulting Fano peak is characteristic with a high transmission value reach to 99% with high sensing performance parameters making the proposed sensor a novel detector for refractive index. The proposed coupling 1D TPCs show a high sensitivity value of 888.252 nm/RIU, ultra-high-quality factor and figure of merit value reach 10 6 , and perfect detection limit value of 10 −7 . The proposed coupling 1D TPCs provides a straightforward platform for sensing refractive index applications with high performance.