Abstract
A detailed analysis of Prism/LiF/ZnO structure based lossy mode resonance sensor is presented for measurement of sucrose concentration. Theoretical and experimental studies using angular interrogation technique has been carried out to achieve high sensitivity for a range of surrounding medium refractive indices (1.33-1.45). Simulation outcomes reveal that a low refractive index layer of LiF may be introduced between substrate and the absorbing film of ZnO to develop a high sensitivity refractive index sensor. Various sensor configurations at different thicknesses of LiF are investigated for both s- and p- polarizations of light at the wavelength of 632.8 nm. The best obtained sensor configurations have been developed experimentally to measure concentration of sucrose solution. The maximum sensitivities of 61.92 °/RIU for s- polarization and 68.80 °/RIU for p-polarization are obtained experimentally, which are found to be in close agreement with the theoretically simulated results.
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