光诱导光子晶格结构中新型的离散空间光孤子

Novel discrete solitons in light-induced photonic lattices

离散孤子标志着从线性到非线性 ,从连续到非连续 ,从相干到非相干 ,人们对孤子认识的一个飞越 .文章简要回顾了近期在二维光致光子晶格结构中有关空间离散光孤子的研究 ,包括基模离散孤子、类矢量离散孤子、离散偶极孤子、离散涡旋孤子和离散孤子串等 .在非线性光折变晶体里用部分相干光诱导的波导阵列中 ,对每一种离散孤子 ,都清楚地观测到光从二维的离散衍射状态到自囚禁形成离散孤子的转变过程 。

We present a brief review of our recent work on discrete solitons in two-dimensional optically-induced photonic lattices in a variety of settings, including fundamental discrete solitons, vector-like discrete solitons, discrete dipole and vortex solitons, and discrete soliton trains. In each case, a clear transition from two-dimensional discrete diffraction to discrete trapping is demonstrated with a waveguide lattice induced by partially coherent light in a bulk photorefractive crystal. Our experimental results are in good agreement with the theoretical analysis of these effects.