Introduction
Materials and methods
Simulation setup
Experimental setup
Results and discussion
Fig.2 (a) SPR reflectivity profile of monolayer Au, Ag, and Al, coupling by BK7 prism and water for the dielectric medium; (b) calculated penetration depth of evanescent wave inside the medium by several metals around the visible range. The dashed line is the 600 nm of wavelength penetration depth in this study. Inset is the evanescent wave profile representing the penetration depth from the interface of a metal and dielectric medium |
Tab.1 Summary of dynamic range performance from related SPR sensor development |
No. | technical remarks | dynamic range limita) | Ref. |
---|---|---|---|
1 | fiber-optic-based SPR sensor | up to 1.4018 RIU (correspond to 6.98 × 10−2 RIU) | [54] |
2 | long range SPR sensor | 8 × 10−3 RIU | [55] |
3 | two channels fiber-optic-based SPR sensor | up to 1.385 TIU (correspond to 5.3 × 10−2 RIU) | [56] |
4 | multi-channel SPR sensor based on single-mode and multimode optical fiber | up to 1.385 RIU (correspond to 5.3 × 10−2 RIU) | [57] |
5 | reflective-distributed SPR sensor based on twin-core optical fiber | up to 1.385 RIU (correspond to 5.3 × 10−2 RIU) | [58] |
6 | distributed fiber SPR sensor | up to 1.385 RIU (correspond to 5.3 × 10−2 RIU) | [59] |
7 | wavelength interrogation, SPR imaging | 4.63 × 10−2 RIU | [60] |
8 | SPR sensor based on injection-molded prism | 0.1 RIU | [61] |
9 | SPR sensor based on phase interrogation | 0.5 RIU | [62] |
10 | aluminum gold sensing on Kretschmann | up to 1.45 RIU (corresponded to 11.8 × 10−2 RIU) | this work |
Note: a) For bulk refractive indice measurement with H2O for baseline |