Rosberg Christian R, Neshev Dragomir N, Krolikowski Wieslaw, Mitchell Arnan, Vicencio Rodrigo A, Molina Mario I, Kivshar Yuri S
Nonlinear Physics Centre, Centre for Ultrahigh-Bandwidth Devices for Optical Systems (CUDOS), Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australia.
Phys Rev Lett. 2006 Aug 25;97(8):083901. doi: 10.1103/PhysRevLett.97.083901. Epub 2006 Aug 23.
We report on the observation of surface gap solitons found to exist at the interface between uniform and periodic dielectric media with defocusing nonlinearity. We demonstrate strong self-trapping at the edge of a LiNbO3 waveguide array and the formation of staggered surface solitons with propagation constant inside the first photonic band gap. We study the crossover between linear repulsion and nonlinear attraction at the surface, revealing the mechanism of nonlinearity-mediated stabilization of the surface gap modes.
我们报告了在具有散焦非线性的均匀和周期性介电介质界面处发现的表面间隙孤子的观测结果。我们展示了在铌酸锂波导阵列边缘的强自陷以及在第一光子带隙内具有传播常数的交错表面孤子的形成。我们研究了表面处线性排斥与非线性吸引之间的转变，揭示了表面间隙模式的非线性介导稳定机制。
