We show that two Bloch modes launched into a nonlinear photonic lattice evolve into a comb or a supercontinuum of spatial frequencies, exhibiting a sensitive dependence on the difference between the quasi - momenta of the two initially excited modes. This phenomenon results from four-wave mixing combined with exchanges of momentum between the optical field and the lattice.
© 2006 Optical Society of America
Original Manuscript: January 17, 2006
Revised Manuscript: March 13, 2006
Manuscript Accepted: May 2, 2006
Published: July 10, 2006
Ofer Manela, Guy Bartal, Mordechai Segev, and Hrvoje Buljan, "Spatial supercontinuum generation in nonlinear photonic lattices," Opt. Lett. 31, 2320-2322 (2006)