This letter proposes an all-solid-state, ultra-low sidelobe optical phased array (OPA) by arranging the broadband metasurface units in the mid-infrared band. Simulation results demonstrate that the OPA generates a specific or a continuous beam sweep between 0 and 42.22 as the 354.56 phase modulation of the designed metasurface. A key feature of our design is that the maximum sidelobe energy of the OPA is only 4% of the main lobe energy within the total deflection angle, which depends on the reflectance fluctuation range of the broadband metasurface less than 11.91% during phase control.

中文翻译：

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用于中红外波段超低旁瓣 OPA 应用的多层宽带超表面

这封信通过在中红外波段布置宽带超表面单元，提出了一种全固态、超低旁瓣光学相控阵 (OPA)。仿真结果表明，OPA 在 0 到 42.22 之间生成特定或连续的光束扫描，作为设计的超表面的 354.56 相位调制。我们设计的一个关键特征是 OPA 的最大旁瓣能量仅为总偏转角内主瓣能量的 4%，这取决于相位控制期间小于 11.91% 的宽带超表面的反射波动范围。