Opt Lett. 2013 Aug 15;38(16):3093-5. doi: 10.1364/OL.38.003093.
Photorefractive (PR) surface waves (SWs) in self-defocusing LiNbO(3):Fe are studied theoretically and experimentally. We demonstrate that SWs can also be formed in a self-defocusing nonlinear medium and that the nonlocal nonlinearity (such as the diffusion component of PR nonlinearity in this Letter) is the essential cause. The forming process of PR SWs with a self-deflection course of light beams has been observed. The results indicate the possibility of concentrating light energy in self-defocusing media, taking advantage of SWs.
光折变（PR）表面波（SW）在自散焦 LiNbO(3):Fe 中得到了理论和实验研究。我们证明 SW 也可以在自散焦非线性介质中形成，而非局域非线性性（如本文中的 PR 非线性的扩散分量）是其本质原因。我们观察到了光束自偏折光程的 PR SW 的形成过程。结果表明，利用 SW 有可能在自散焦介质中集中光能。
