Design of an optimized ${\text{MoS}}_2$-based highly sensitive near-infrared surface plasmon resonance imaging biosensor

Abstract

A surface plasmon resonance imaging biosensor based on ${\text{MoS}}_2$ deposited on Aluminium substrate is designed for high imaging sensitivity and detection accuracy. The proposed biosensor exhibits better performance than graphene-based biosensor in the near-infrared regime. A high imaging sensitivity of more than 970 ${\text{RIU}}^{-1}$ is obtained at the wavelength of 1540 nm. The effect of aluminium thickness, number of ${\text{MoS}}_2$ layers and the refractive index of sensing layer are investigated to obtain an optimized design for high sensor performance. In addition, the sensor performance comparison of ${\text{MoS}}_2$ and other two-dimensional transition metal dichalcogenide materials based biosensor in the near-infrared regime are also presented. The designed ${\text{MoS}}_2$ mediated surface plasmon resonance imaging biosensor could provide potential applications in surface plasmon resonance imaging detection of multiple biomolecular interactions simultaneously.

11 pages, 8 figures