Ultrafast surface plasmon-polariton logic gates and half-adder
Ultrafast surface plasmon-polariton logic gates and half-adder
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DOI：
10.1364/oe.23.031755
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发表时间：
2015-12-14
期刊：
影响因子：
3.8
通讯作者：
Reinhardt, Carsten
中科院分区：
文献类型：
--
作者：
Birr, Tobias;Zywietz, Urs;Reinhardt, Carsten
在本文中，我们提出了一个等离子体模型系统，用于利用介电交叉波导结构中的线性干涉效应实现超快全光非、与、或和异或门操作。表面等离子体极化子的波导由简单但高精度的显微光刻工艺产生，并优化为单模工作，激发激光波长为800 nm。所提出的结构的功能是用锁模钛蓝宝石激光器的低于30秒的激光脉冲来证明的。利用泄漏辐射显微镜，我们展示了一个基本结构的超快SPP开关和逻辑操作，该结构由两个交叉波导和沿输入波导平分线的附加输出波导组成。单个门在10 μ m x 20 μ m的占地面积上实现。有限差分时域模拟支持实验研究，实验结果与数值模拟结果吻合良好。为了利用高精度的制造方法及其实现功能复杂等离子体电路的巨大潜力，我们通过在仅10 μ m x 28 μ m的面积上组合和级联几个等离子体波导元件和逻辑门元件，实验展示了半加法器结构及其操作。(C) 2015 Optical Society of America
In this paper, we present a plasmonic model system for the realization of ultrafast all-optical NOT, AND, OR, and XOR gate operations using linear interference effects in dielectric crossed waveguide structures. The waveguides for the surface plasmon-polaritons are produced by a simple but highly accurate microscopic lithographic process and are optimized for single mode operation at an excitation laser wavelength of 800 nm. The functionality of the presented structures is demonstrated using sub-30 fs laser pulses from a mode locked titanium: sapphire laser. Using leakage radiation microscopy we show ultrafast SPP switching and logic operations of one basic structure consisting of two crossed waveguides with an additional output waveguide along the bisecting line of the input waveguides. The individual gates are realized on a footprint of 10 mu m x 20 mu m. Experimental investigations are supported by finite-difference time-domain simulations, where good agreement between experimental results and numerical simulations is obtained. To exploit the high precision of the fabrication method and its huge potential for realizing functional complex plasmonic circuitry we experimentally demonstrate a half-adder structure and its operation by combining and cascading several plasmonic waveguide components and logic gate elements on an area of only 10 mu m x 28 mu m. (C) 2015 Optical Society of America