Determination of the Dielectric Constant and the Thickness of Gold Film by SPR Technique

Experimental data obtained from the SPR technique was fitted using the Winspall simulation program to determine the dielectric constant and the thickness of its gold film. Experiment was performed by measuring the reflectance of reflected light against the incoming angle of Kretschmann configuration. Two kind of prisms were used namely BK7 and SF11. For a comparison, the same data was processed with manual calculation based on Fresnel and Kretschmann formulation. The difference between result from Winspall simulation program and that from manual calculation was 2.86% for BK7/Au/Air and 15.78% for SF11/Au/Air.