非线性光子kagome纳米带中的局域模
Localized modes in nonlinear photonic kagome nanoribbons
摘要：
我们研究光在非线性（克尔）kagome晶格中的不同宽度的窄条的形状的本地化。对于最窄的带，能带结构的特点是一个平坦的带，导致线性动力学捕获的初始本地化的激发。我们还发现了几何诱导的非线性模式的双稳态的宽度的变化。随着宽度的增加，观察到从一维到二维的局部化行为的交叉，对于相对窄的条带，获得二维行为。
英文摘要：
We examine localization of light in nonlinear (Kerr) kagome lattices in the shape of narrow strips of varying width. For the narrowest ribbon, the band structure features a flat band leading to linear dynamical trapping of an initially localized excitation. We also find a geometry-induced bistability of the nonlinear modes as the width of the strip is changed. A crossover from one to two dimensions localization behavior is observed as the width is increased, attaining two-dimensional behavior for relatively narrow ribbons.
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