Opt Lett. 2019 Jan 1;44(1):110-113. doi: 10.1364/OL.44.000110.
Independent manipulation of phase and polarization of optical fields is of great interest in various applications, including vector-field generation, optical tweezers, and nanolithography. The integration of phase and polarization manipulation on a single optical device may greatly simplify optical systems and eases optical alignment. In this Letter, a family of reflective cross-shaped quarter-wave birefringent metasurfaces is proposed to achieve full control of polarization and phase of reflected waves. Based on the proposed metasurfaces, two meta-mirrors are designed with integrated functions of polarization conversion and sub-diffraction focusing. Numerical investigations also reveal the achromatic focusing performance of the two meta-mirrors. The proposed metasurfaces with independent manipulation of polarization and phase provide flexible building blocks for constructing complicated vector optical fields.
独立操控光场的相位和偏振具有广泛的应用，包括矢量场生成、光镊和纳米光刻等。在单个光学器件上集成相位和偏振操控可以极大地简化光学系统并简化光路调节。在本信中，我们提出了一类反射型十字型四分之一波双折射超表面，以实现对反射波的偏振和相位的完全控制。基于所提出的超表面，设计了两个具有集成偏振转换和亚衍射聚焦功能的亚波长反射镜。数值研究还揭示了这两个亚波长反射镜的消色差聚焦性能。所提出的具有独立操控偏振和相位的超表面为构建复杂矢量光场提供了灵活的构建模块。
