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首页> 外文期刊>Journal of Optics >Realization of all-optical NAND and NOR logic functions with photonic crystal based NOT, OR and AND gates using De Morgan's theorem
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Realization of all-optical NAND and NOR logic functions with photonic crystal based NOT, OR and AND gates using De Morgan's theorem

机译：使用De Morgan定理，基于光子晶体的NOT，OR和AND门实现全光NAND和NOR逻辑功能

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AbstractIn this article, we propose the realization of photonic crystal based all-optical universal logic gates, NAND and NOR with basic logic gates viz. NOT, AND and OR in two level logic using De Morgan’s theorem. As per the theorem, NAND or NOR gate can be designed with two NOT gates in first level, cascaded to a second level OR gate or AND gate, respectively. Initially, the basic logic gates are designed and optimized such that their implementation in the design of NAND and NOR gates cannot degrade the threshold value of logic levels. Length of the input waveguides in each design is kept common so as to have a change in the interference of the input signals with a phase difference of 0° and 180°. The proposed basic logic gates are resulted with a contrast ratio of 11.04, 8.24, and 5.18 dB, respectively. While the calculated values of contrast ratio of NAND and NOR gates are 5.81 and 4.02 dB, respectively. Moreover, the bit rate of the proposed designs is above 7.485 Tbps which shows their inevitable usage in high speed data communication networking.
机译： Abstract 在本文中，我们提出了基于光子晶体的全光学通用实现逻辑门，具有基本逻辑门的NAND和NOR。使用De Morgan定理在两个层次的逻辑中进行NOT，AND和OR。根据该定理，可以将“与非”或“或非”门设计为在第一级具有两个“非”门，分别级联至第二级“或”门或“与”门。最初，对基本逻辑门进行了设计和优化，以使其在NAND和NOR门设计中的实现不会降低逻辑电平的阈值。在每种设计中，输入波导的长度保持相同，以使输入信号的干扰发生变化，相位差为0°和180°。提出的基本逻辑门的对比度分别为11.04、8.24和5.18 dB。 NAND和NOR门的对比度的计算值分别为5.81和4.02 dB。此外，提出的设计的比特率高于7.485 Tbps，这表明它们在高速数据通信网络中是不可避免的。

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