Institute of Physics, University of Belgrade, P.O. Box 57, 11001 Belgrade, Serbia.
Opt Lett. 2010 Jul 15;35(14):2355-7. doi: 10.1364/OL.35.002355.
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.
我们通过数值方法研究了在截断一维光子晶格边界附近两个反向传播（CP）光束的相互作用。我们证明了光束的相互耦合抑制了来自晶格边缘的有效排斥，从而导致 CP 表面孤子的形成。这种局域光束可以在相同的以及相邻的波导中传播。我们还揭示了晶格无序显著降低了形成 CP 表面态的阈值功率。
