This study theoretically investigated the surface plasmon polaritons resonance phenomena at the four-level high magneto-optical system and a nano-composite (silver-silica nano-composite \(Agsio_{2}\) ) interface. The surface plasmon polaritons resonance sensing is studied with variation of applied driving fields and system parameters. The permittivity and permeability ( \(\epsilon _{d}\) , \(\mu _{d}\) ) of the high magneto-optical medium play a key role in controlling the surface plasmon polaritons resonance sensitivity. The high peak value of sensitivity is recorded to 2000 \(\theta /RIU\) against the control field detuning and Rabi frequency ( \(\delta _{1}/\Gamma \) and \(\Omega _{1}/\Gamma \) ) as well as phases ( \(\phi _{1,2}\) ). The minimum sensitivity is found to be 200 \(\theta /RIU\) against probe field detuning ( \(\delta _{p}/\Gamma \) ). The results indicate potential uses in optical gas sensing, LED technology, and fiber optic sensors.
