Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing, China.
Nano Lett. 2011 Feb 9;11(2):471-5. doi: 10.1021/nl103228b. Epub 2010 Dec 23.
We show that the local electric field distribution of propagating plasmons along silver nanowires can be imaged by coating the nanowires with a layer of quantum dots, held off the surface of the nanowire by a nanoscale dielectric spacer layer. In simple networks of silver nanowires with two optical inputs, control of the optical polarization and phase of the input fields directs the guided waves to a specific nanowire output. The QD-luminescent images of these structures reveal that a complete family of phase-dependent, interferometric logic functions can be performed on these simple networks. These results show the potential for plasmonic waveguides to support compact interferometric logic operations.
我们表明，通过在银纳米线上覆盖一层量子点，并通过纳米级介电间隔层将其与纳米线表面隔开，可以对沿银纳米线传播的等离子体的局域电场分布进行成像。在具有两个光学输入的简单银纳米线网络中，控制输入场的光偏振和相位可将导波引导至特定的纳米线输出。这些结构的 QD 发光图像表明，可以在这些简单的网络上执行完整的一组与相位相关的干涉逻辑功能。这些结果表明了等离子体波导支持紧凑的干涉逻辑操作的潜力。
