Tan Qi, Li Hui, Zhao Zhengyi, Li Jie, Ding Guanchu, Xu Wenhui, Xu Hang, Zhang Yating, Wu Liang, Yang Yiguang, Yao Jianquan
Opt Express. 2024 May 20;32(11):19088-19104. doi: 10.1364/OE.522351.
Compared with traditional electrical logic gates, optical or terahertz (THz) computing logic gates have faster computing speeds and lower power consumption, and can better meet the huge data computing needs. However, there are limitations inherent in existing optical logic gates, such as single input/output channels and susceptibility to interference. Here, we proposed a new approach utilizing polarization-sensitive graphene-vanadium dioxide metasurface THz logic gates. Benefitting from two actively tunable materials, the proposed controlled-NOT logic gate(CNOT LG) enables versatile functionality through a dual-parameter control system. This system allows for the realization of multiple output states under diverse polarized illuminating conditions, aligning with the expected input-output logic relationship of the CNOT LG. Furthermore, to demonstrate the robustness of the designed THz CNOT LG metasurface, we designed an imaging array harnessing the dynamic control capabilities of tunable meta-atoms, facilitating clear near-field imaging. This research is promising for advancing CNOT LG applications in the THz spectrum. It has potential applications in telecommunications, sensing, and imaging.
与传统的电逻辑门相比，光学或太赫兹（THz）计算逻辑门具有更快的计算速度和更低的功耗，能够更好地满足海量数据计算需求。然而，现有的光学逻辑门存在固有局限性，例如单输入/输出通道以及易受干扰。在此，我们提出了一种利用偏振敏感的石墨烯 - 二氧化钒超表面太赫兹逻辑门的新方法。受益于两种可主动调谐的材料，所提出的受控非门逻辑门（CNOT LG）通过双参数控制系统实现了多功能性。该系统允许在不同的偏振照明条件下实现多种输出状态，符合CNOT LG预期的输入 - 输出逻辑关系。此外，为了证明所设计的太赫兹CNOT LG超表面的稳健性，我们利用可调谐超原子的动态控制能力设计了一个成像阵列，便于进行清晰的近场成像。这项研究对于推进CNOT LG在太赫兹频段的应用具有前景。它在电信、传感和成像领域具有潜在应用。
