Abstract

It is well known that nonlinear periodic media support gap solitons. These solutions for the electric field, which vanish asymptotically, can exist because at high intensities the nonlinearity shifts the position of the photonic band gap. Frequencies which are inside the photonic band gap at low intensities, and thus are evanescent, may fall outside the gap at high intensities, and thus are propagating.

© 1993 Optical Society of America