Hollow plasmonic high Q-factor absorber for bio-sensing in mid-infrared application

High Q-factor elements have been noticed for detecting biological particles with more accuracy, and in this current research, we have noticed a High Q- Factor absorber for bio sensing and as the first result we have confirmed that the higher Q- Factor is given more figure of merit in the presence of various biological materials. A parametric study has been revealed that how the dimensions effect the resonance of the absorber and the reflection. Finally, based on the manner of surface plasmon in absorbers in the interface of the metal and dielectric layer, we have developed an optical sensor by implementing a thin layer of active material. Therefore, the final structure is useful for bio sensing and energy harvesting applications. Our results revealed that the absorber particle enhanced the Absorption Cross Section for final model with an active layer of InGaAsSb and the current is increased more than 4 times in comparison with the case that we do not have any cylindrical particle.