We address two-dimensional (2D) waveguide arrays where light tunneling into neighboring waveguides may be effectively suppressed by an out-of-phase harmonic modulation of the refractive index in neighboring waveguides at suitable frequencies. Genuine 2D features, such as anisotropic diffraction engineering, diffraction-free propagation along selected directions in the transverse plane, and tunneling inhibition for multichannel vortices, are shown to occur.
Kartashov, Y.V., Szameit, A., Vysloukh, V.A., Torner, L. Light tunneling inhibition and anisotropic diffraction engineering in two-dimensional waveguide arrays. "Optics letters", Gener 2009, vol. 34, núm. 19, p. 2906-2908.