Huang Yun, Zhu Jia, Jin Shengxiao, Wu Meizhang, Chen Xiaoyu, Wu Wengang
Opt Lett. 2020 Apr 1;45(7):1707-1710. doi: 10.1364/OL.387408.
We propose a polarization-controlled bifunctional metasurface composed of arrayed trapezoidal nanoantennas. Under orthogonal-polarized incidence, different types of gap-surface plasmons are generated, regulating the intensity and phase, respectively. Thus, structural color printing and beam deflection functions are achieved on a miniaturized chip. The color printing function works from 400 to 800 nm, exhibiting a subwavelength-scale chromatic image with a broad gamut. The beam deflection function works from 360 to 540 nm, mapping light to the first diffraction order with the anomalous angle from 40.4° to 76.6°. The proposed bifunctional metasurface could serve as a key component in integrated optics systems and will find many other wide-ranging applications in optical and biological areas.
我们提出了一种由排列的梯形纳米天线组成的偏振控制双功能超表面。在正交偏振入射下，会产生不同类型的间隙表面等离子体，分别调节强度和相位。因此，在小型芯片上实现了结构彩色打印和光束偏转功能。彩色打印功能在400至800纳米范围内起作用，呈现出具有广泛色域的亚波长尺度彩色图像。光束偏转功能在360至540纳米范围内起作用，将光映射到一级衍射级，异常角度为40.4°至76.6°。所提出的双功能超表面可作为集成光学系统中的关键组件，并将在光学和生物领域找到许多其他广泛的应用。
