Gao Zhanjie, Zhao Wannian, Gao Xinyue, Chen Aixi, Ye Weixiang, Song Qinghua, Genevet Patrice, Dorfman Konstantin E
Department of Physics, Zhejiang Sci-Tech University, Hangzhou 310018, China.
Zhejiang Key Laboratory of Quantum State Control and Optical Field Manipulation, Department of Physics, Zhejiang Sci-Tech University, 310018 Hangzhou, China.
Nano Lett. 2025 Apr 9;25(14):5565-5571. doi: 10.1021/acs.nanolett.4c05273. Epub 2025 Mar 31.
Metasurfaces show an extraordinary ability for polarization control, despite the limitations imposed by their working bandwidth and complex meta-atom designs. Here, we present a strategy for generating arbitrary polarization in the broadband, relying solely on the Pancharatnam-Berry phase. The proposed metasurface design comprises two metamolecules arranged in a staggered configuration. Importantly, the orientation of the two metamolecules provides a new degree of freedom to control both the amplitude and phase of right- and left-circular polarization components. We experimentally demonstrated that the polarization of the scattered light can cover the entire Poincaré sphere by merely tuning the metamolecule orientation. These results provide a unique approach for fabricating ultracompact photonic devices and integrated quantum optical systems.
尽管超表面存在工作带宽和复杂的超原子设计所带来的限制，但它们在偏振控制方面展现出了非凡的能力。在此，我们提出一种仅依靠庞加莱-贝里相位在宽带内产生任意偏振的策略。所提出的超表面设计由两个以交错配置排列的超分子组成。重要的是，这两个超分子的取向提供了一个新的自由度，用于控制右旋和左旋圆偏振分量的幅度和相位。我们通过实验证明，仅通过调整超分子取向，散射光的偏振就能覆盖整个庞加莱球。这些结果为制造超紧凑型光子器件和集成量子光学系统提供了一种独特的方法。
