Precise Measurement of Goos-Hänchen Shift form Weakly Absorbing Slab

For a linearly polarized light, when total internal reflection takes place, the reflected beam undergoes a small lateral shift, which is known as the Goos-Hänchen shift. In this example, we demonstrate similar effects for a weakly absorbing dielectric slab, following the theoretical work of L. Wang, et al., but using the numerical modeling technologies in VirtualLab Fusion. The influence from the absorption of the slab medium is investigated. For different medium absorptions, we measure the center of the reflected beam with respect to the incidence angle, and we compare the result with the reference.