DESIGN AND MEASUREMENT OF DIELECTRIC SENSOR-BASED ON SURFACE-PLASMON EXCITATION

A chemical sensor based on surface plasmon excitation was constructed by deposited gold metal film directly on a prism. This chemical sensor has been optimized by use of computer simulation. Using the simulated optimum condition, we measured the reflectivity vs. position of the s urface plasmon dip with different dielectric environment such as air, water, and ethanol. Calculated and experimentally measured performance s are in good agreement, Furthermore,we also found and detailed the li nearity of the deviation angle of the surface plasmon dip with differe nt composition ethanol-water solutions. (C) 1998 Elsevier Science B.V. All rights reserved.