Two-prism setup for surface plasmon resonance studies

A two-prism experimental arrangement having wide angular scan ranges for the study of surface plasmon resonance is presented. The setup has a single rotating element instead of a high cost goniometer and a stationary photodetector which is positioned such that it always receives the reflected beam normally. The usefulness of the setup has been verified by experimental and theoretical studies of plasmon resonance at an Au-air interface. © 2005 American Institute of Physics.