Abstract
We show that a longitudinal (Goos-Hänchen) and a transverse (Imbert-Fedorov) beam displacement can be observed upon total internal reflection at two-dimensional photonic crystal slabs. By inspecting only the dispersion relation of the photonic crystal we derive qualitative criteria for the direction of the beam shift. Furthermore, it will be shown that the beam shift can be strongly enhanced at particular angles of incidence where Fabry-Pérot resonances of the slab are excited. The Renard model, which predicts the strength of the shifts based on the Poynting vector in the totally reflecting medium, has been adapted to quantitatively analyze the beam shift.
- Received 19 October 2007
DOI:https://doi.org/10.1103/PhysRevA.77.053802
©2008 American Physical Society