Prediction of a Resonance-Enhanced Laser-Beam Displacement at Total Internal Reflection in Semiconductors

Abstract
Lateral Goos-Hänchen shifts can be increased by factors of 10-100 for laser frequency near an exciton-polariton resonance in semiconductors. A "negative" shift can occur for laser frequency ωL in the pseudogap ω0<ωL<ωl. Surface irregularities can be probed with this effect.