Micro/nano optoelectronic devices are widely studied as basic building blocks for on-chip integrated microsystem and multichannel logic units with excellent optoelectronic properties that are especially important part for interconnection route construction. Here, based on anisotropic waveguides, an optical switch with an on/off ratio of 2.14 is built up in a 2D CdS branched nanowire array. Because the branches are obliquely distributed at the same side of the trunk in a highly ordered form, the guided photoluminescence (PL) intensity from the trunk into the branch tightly relates to its angle. Based on the different intensity of the guided PL emitted from the end of each branch, the position of the incident spot in the backbone area can be identified accurately, making a feasible construction of an on-chip position-sensitive detector to realize an all-optical information process.

中文翻译：

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基于CdS多支纳米线阵列的片上可编程光开关

微米/纳米光电器件已被广泛研究为具有优异光电特性的片上集成微系统和多通道逻辑单元的基本构件，这些特性对于互连线路的构建尤为重要。在此，基于各向异性波导，在2D CdS分支纳米线阵列中构建了具有2.14导通/截止比的光开关。因为分支以高度有序的形式倾斜地分布在树干的同一侧，所以从树干到分支的引导光致发光（PL）强度与其角度紧密相关。根据从每个分支的末端发出的引导PL的不同强度，可以准确识别出入射点在骨干区域中的位置，