We study numerically the interaction of two counterpropagating (CP) optical beams near the boundary of a truncated one-dimensional photonic lattice. We demonstrate that the mutual coupling of beams suppresses the effective repulsion from the lattice edge, resulting in the formation of CP surface solitons. Such localized beams may propagate in the same, as well as in neighboring, waveguides. We also reveal that the lattice disorder reduces substantially the threshold power for the formation of CP surface states.
© 2010 Optical Society of America
Original Manuscript: April 21, 2010
Revised Manuscript: June 17, 2010
Manuscript Accepted: June 17, 2010
Published: July 13, 2010
Dragana Jović, Dejan Timotijević, Aleksandra Piper, Najdan Aleksić, Yuri S. Kivshar, and Milivoj Belić, "Counterpropagating solitons at boundary of photonic lattices," Opt. Lett. 35, 2355-2357 (2010)