Suntsov S, Makris K G, Christodoulides D N, Stegeman G I, Morandotti R, Volatier M, Aimez V, Arès R, Yang E H, Salamo G
College of Optics and Photonics, CREOL & FPCE, University of Central Florida, 4000 Central Florida Blvd., Orlando, Florida 32816, USA.
Opt Express. 2008 Jul 7;16(14):10480-92. doi: 10.1364/oe.16.010480.
Discrete spatial solitons traveling along the interface between two dissimilar one-dimensional arrays of waveguides were observed for the first time. Two interface solitons were found theoretically, each one with a peak in a different boundary channel. One evolves into a soliton from a linear mode at an array separation larger than a critical separation where-as the second soliton always exhibits a power threshold. These solitons exhibited different power thresholds which depended on the characteristics of the two lattices. For excitation of single channels near and at the boundary, the evolution behavior with propagation distance indicates that the solitons peaked near and at the interface experience an attractive potential on one side of the boundary, and a repulsive one on the opposite side. The power dependence of the solitons at variable distance from the boundary was found to be quite different on opposite sides of the interface and showed evidence for soliton switching between channels with increasing input power.
首次观察到沿两个不同的一维波导阵列之间的界面传播的离散空间孤子。从理论上发现了两个界面孤子，每个孤子在不同的边界通道中具有一个峰值。其中一个孤子在阵列间距大于临界间距时从线性模式演化为孤子，而第二个孤子始终表现出功率阈值。这些孤子表现出不同的功率阈值，这取决于两个晶格的特性。对于边界附近和边界处单通道的激发，随传播距离的演化行为表明，在边界一侧，峰值靠近界面和在界面处的孤子受到吸引势，而在另一侧受到排斥势。发现孤子在距边界可变距离处的功率依赖性在界面的两侧有很大不同，并显示出随着输入功率增加孤子在通道之间切换的证据。
