A beam of light incident upon a diffractive structure can under resonance conditions be subject to a rather large lateral displacement. The effect is demonstrated with a Gaussian profile beam and two geometries based on a waveguide grating and a single-mode waveguide.
© 1998 Optical Society of America
(050.5080) Diffraction and gratings : Phase shift
Frank Schreier, Martin Schmitz, and Olof Bryngdahl, "Beam displacement at diffractive structures under resonance conditions," Opt. Lett. 23, 576-578 (1998)