Abstract: We present finite-difference time-domain studies of the Goos-Hanchen effect observed at the reflection of a self-collimated beam from the surface of a two-dimensional photonic crystal. We describe a method of tuning the shift of the reflected beam in photonic crystals through the modification of the surface, first structurally, as a change in the radius of the surface rods, and then all-optically, with the addition of nonlinear material to the surface layer. We demonstrate all-optical tunability and intensity-dependent control of the beam shift. Crown Copyright

Keywords: nonlinear optics; photonic band gap materials; goos-hanchen shift;; band-gap; splitters; modes

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