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Refractive index gas sensor based on the Tamm state in a one-dimensional photonic crystal: Theoretical optimisation

Article scientifique 2020 Anglais

Résumé

Abstract Gas sensors are important in many fields such as environmental monitoring, agricultural production, public safety, and medical diagnostics. Herein, Tamm plasmon resonance in a photonic bandgap is used to develop an optical gas sensor with high performance. The structure of the proposed sensor comprises a gas cavity sandwiched between a one-dimensional porous silicon photonic crystal and an Ag layer deposited on a prism. The optimised structure of the proposed sensor achieves ultra-high sensitivity (S = 1.9×105 nm/RIU) and a low detection limit (DL = 1.4×10−7 RIU) compared to the existing gas sensor. The brilliant sensing performance and simple design of the proposed structure make our device highly suitable for use as a sensor in a variety of biomedical and industrial applications.

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Zaky, Z., Ahmed, A., Shalaby, A., Aly, A. (2020). Refractive index gas sensor based on the Tamm state in a one-dimensional photonic crystal: Theoretical optimisation. https://doi.org/10.1038/s41598-020-66427-6

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Zaky A. Zaky Ashour M. Ahmed A. S. Shalaby Arafa H. Aly

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