Bartal Guy, Manela Ofer, Segev Mordechai
Department of Physics and Solid State Institute, Technion, Haifa 32000, Israel.
Phys Rev Lett. 2006 Aug 18;97(7):073906. doi: 10.1103/PhysRevLett.97.073906.
We present the first experimental study of spatial four-wave mixing in photonic lattices, demonstrating universal aspects of nonlinear processes in periodic media, such as engineered phase matching, Bloch-wave folding, and continuous control over the band at which the interaction products emerge.