Angular shift in the Kretschmann configuration

摘要

Angular shift of the reflected beam is investigated analytically when surface plasmon resonance is excited in Kretschmann configuration. It is shown that the maximum angular shift does not occur at the resonant angle with the minimum of reflectivity but occurs at the two incident angles beside the resonant angle, which is different from Goos-Hänchen shift and can be used to surface plasmon resonance sensor based on angular shift.