PROPAGATION AND DEFLECTION OF GUIDED MODES IN PLANAR WAVE-GUIDES VIA GRATING ROTATION

Propagation and deflection of guided modes in a polymer slab waveguide is studied. Rotation of the grating structure with respect to the pla ne of incidence deflects the waveguide modes in the plane of the sampl e so that the propagation direction is no longer perpendicular to the grating grooves. The deflection angles are measured as a function of t he grating rotation angle and the experimental results are compared wi th theoretically expected values. The difference in polarization behav iour between waveguide and plasmon surface polarition grating rotation coupling is shown.