Nonlinear diffraction from a virtual beam. Academic Article uri icon


  • We observe experimentally a novel type of nonlinear diffraction in the process of two-wave mixing on a nonlinear quadratic grating. We demonstrate that when the nonlinear grating is illuminated simultaneously by two noncollinear beams, a second-harmonic diffraction pattern is generated by a virtual beam propagating along the bisector of the two pump beams. The observed diffraction phenomena is a purely nonlinear effect that has no analogue in linear diffraction.

published proceedings

  • Phys Rev Lett

citation count

  • 39

complete list of authors

  • Saltiel, Solomon M||Neshev, Dragomir N||Krolikowski, Wieslaw||Voloch-Bloch, Noa||Arie, Ady||Bang, Ole||Kivshar, Yuri S

publication date

  • February 2010