Song Qinghua, Baroni Arthur, Sawant Rajath, Ni Peinan, Brandli Virginie, Chenot Sébastien, Vézian Stéphane, Damilano Benjamin, de Mierry Philippe, Khadir Samira, Ferrand Patrick, Genevet Patrice
Université Cote d'Azur, CNRS, CRHEA, Rue Bernard Gregory, Sophia Antipolis, 06560, Valbonne, France.
Aix Marseille Université, CNRS, Centrale Marseille, Institut Fresnel, 13013, Marseille, France.
Nat Commun. 2020 May 27;11(1):2651. doi: 10.1038/s41467-020-16437-9.
Controlling light properties with diffractive planar elements requires full-polarization channels and accurate reconstruction of optical signal for real applications. Here, we present a general method that enables wavefront shaping with arbitrary output polarization by encoding both phase and polarization information into pixelated metasurfaces. We apply this concept to convert an input plane wave with linear polarization to a holographic image with arbitrary spatial output polarization. A vectorial ptychography technique is introduced for mapping the Jones matrix to monitor the reconstructed metasurface output field and to compute the full polarization properties of the vectorial far field patterns, confirming that pixelated interfaces can deflect vectorial images to desired directions for accurate targeting and wavefront shaping. Multiplexing pixelated deflectors that address different polarizations have been integrated into a shared aperture to display several arbitrary polarized images, leading to promising new applications in vector beam generation, full color display and augmented/virtual reality imaging.
利用衍射平面元件控制光的特性需要全偏振通道以及在实际应用中对光信号进行精确重构。在此，我们提出一种通用方法，该方法通过将相位和偏振信息编码到像素化超表面中，实现具有任意输出偏振的波前整形。我们应用这一概念将具有线性偏振的输入平面波转换为具有任意空间输出偏振的全息图像。引入了一种矢量叠层成像技术来映射琼斯矩阵，以监测重构的超表面输出场并计算矢量远场图案的全偏振特性，证实像素化界面可以将矢量图像偏转到所需方向，以实现精确瞄准和波前整形。已将针对不同偏振的复用像素化偏转器集成到一个共享孔径中，以显示多个任意偏振图像，从而在矢量光束生成、全彩色显示以及增强/虚拟现实成像方面带来了有前景的新应用。
