Effect of oxide layer on the performance of silver based fiber optic surface plasmon resonance sensor

Fiber optic surface plasmon resonance sensors based on bi-layers of Ag-TiO2 and Ag-Cu2O are proposed and analyzed experimentally. Influence of oxide layer thickness on the sensitivity of sensors has been discussed. Sensor based on Ag-Cu2O bi-layers has been found to be more sensitive than that of Ag-TiO2 bi-layers. Also, 40 nm Ag-5 nm Cu2O bi-layers based sensor acquires highest sensitivity. Its sensitivity diminishes with rise in thickness of Cu2O layer beyond 5 nm.

Automated summary

We propose and experimentally analyze fiber optic surface plasmon resonance sensors based on bi-layers of Ag-TiO2 and Ag-Cu2O. The influence of oxide layer thickness on sensor sensitivity is discussed. It is found that sensors based on Ag-Cu2O bi-layers are more sensitive than those based on Ag-TiO2 bi-layers. Additionally, the sensor based on 40 nm Ag-5 nm Cu2O bi-layers achieves the highest sensitivity, which diminishes with an increase in Cu2O layer thickness beyond 5 nm.