Theoretical investigation of sensitivity enhancement in dielectric multilayer surface plasmon sensor

Abstract

Improving the sensitivity of surface plasmon resonance using a multilayer system within the Kretschmann configuration is investigated. In the present study, an alternative approach is proposed to improve the sensitivity of the conventional SPR based on a silver layer, by an additional dielectric nanolayer of SiO 2 , MgO, and TiO 2 over the silver/silicon layer.

High-performance bimetallic film surface plasmon resonance sensor based on film thickness optimization

“…The integrals of the maximal electric field (S) for single gold layer, bimetallic film and single silver layer SPR sensors are 44.14, 43.34 and 38.69, respectively. This result confirms the statement of correlation between the sensitivity and the electric field integral as described by Benkabou et al [26].…”

Figure of Merit Enhancement of a Surface Plasmon Resonance Sensor Using a Low-Refractive-Index Porous Silica Film

“…Shukla et al [ 14 ] and Bao et al [ 15 ] both demonstrated that the sensitivity of an SPR sensor could be increased by adding a ZnO thin film. Besides, Benkabou et al [ 16 ] achieved sensitivity enhancement by employing the dielectric multilayer structure in the SPR sensor.…”

Optimized Dielectric Film for Maximum Sensitivity of Nearly Guided‐Wave Surface Plasmon Resonance Sensor

“…Refractive index (n) Extinction coefficient (k) References SF-11L glass 1.73205 0 [14] Ag 0.13 3.99 [14] Si 3.92 0.01 [14] AlAs 3.112 0 [15] TiO 2 2.2789 0 [18] Si 3 N 4 2.019 0 [15] Water 1.33 0 [14] Figure 3. Sensitivity as a function of dielectric film thickness for the NGWSPR sensor with Si, AlAs, TiO 2 , or Si 3 N 4 film.…”

“…Besides, Shukla et al [16] and Bao et al [17] demonstrated a top ZnO layer is effective in enhancing the sensitivity of a fiber-type and prismtype SPR sensor respectively. Benkabou et al [18] achieved the sensitivity enhancement by employing a dielectric multilayer structure in a SPR sensor.…”