State Key Laboratory for Mesoscopic Physics & Department of Physics, Peking University, Beijing 100871, People's Republic of China.
Nano Lett. 2012 Nov 14;12(11):5784-90. doi: 10.1021/nl303095s. Epub 2012 Nov 2.
We report realizations of nanoscale integrated all-optical XNOR, XOR, NOT, and OR logic gates using plasmonic slot waveguides based on linear interference between surface plasmon polariton modes. The miniature device size with lateral dimensions smaller than 5 μm, precisely controlled optical phase difference, and quasi-monochromatic surface plasmon polariton modes excited by a continuous wave 830 nm laser beam ensure a high intensity contrast ratio of 24 dB between the output logic states "1" and "0". Compared with previous reported results, the intensity contrast ratio is enhanced 4-fold, whereas the lateral dimension is reduced 4-fold. These compact logic devices are stable, robust, free from environmental impact, and much suitable for practical on-chip applications. These also provide a means to construct all-optical logic devices and nanophotonic processors.
我们报道了使用基于表面等离激元模式线性干涉的等离子体槽波导实现纳米级集成全光 XNOR、XOR、NOT 和 OR 逻辑门。微型器件尺寸小于 5 μm，精确控制的光学相位差以及由连续波 830nm 激光束激发的准单色表面等离激元模式，确保了输出逻辑状态“1”和“0”之间的高对比度为 24dB。与以前报道的结果相比，强度对比度提高了 4 倍，而横向尺寸减小了 4 倍。这些紧凑的逻辑器件稳定、坚固、不受环境影响，非常适合实际的片上应用。它们还为构建全光逻辑器件和纳米光子处理器提供了一种手段。
