Large enhancement of nonlinear Goos-Hanchen shifts and optical bistability due to surface plasmon excitations

摘要

The Goos-Hanchen shift of p wave beams incident on a metal-nonlinear dielectric bilayer in the Kretschmann configuration is studied theoretically. The reflectance, the phase of the reflection coefficient and the Goos-Hanchen shift are calculated in a numerically precise manner by using the invariant imbedding method. The Goos-Hanchen shift has been found to be able to take both extremely large positive and negative values due to surface plasmon excitations and very strong bistability and unique hysteresis phenomena appear. In addition, several previous results on the intensity dependence of the Goos-Hanchen shift are pointed out to be erroneous.