On‐Chip Multidimensional Manipulation of Far‐Field Radiation with Guided Wave‐Driven Metasurfaces
Yuebian Zhang, Zhancheng Li, Wenwei Liu, Hua Cheng, Duk‐Yong Choi, Jianguo Tian, Shuqi Chen
Abstract
Abstract Miniaturization and integration of multiple optical components in one chip are important trends in the future development of optical chips. Despite various on‐chip multifunctional metasurfaces having been proposed, simultaneously manipulating the polarization and wavefront of far‐field radiation still remains a challenge. Here, a novel approach to simultaneously realize on‐chip polarization and wavefront manipulation of far‐field radiation with guided wave‐driven geometric metasurfaces is theoretically proposed and experimentally demonstrated. Various polarized beams with controllable radiation angles can be generated by maneuvering phase gradients and far‐field interferences of meta‐atoms. The phase and amplitude of off‐chip radiation can be tailored all at once by altering the rotation angles and positions of each meta‐atom. As a proof of concept, a guided wave‐driven metalens and four different on‐chip polarization generators are fabricated and characterized. These on‐chip devices work at broadband and can realize mode‐dependent beam deflection. This study provides a practical route toward on‐chip multidimensional control of far‐field radiation, which could support a further step in the development of photonic integrated circuits, wearable near‐eye displays, and optical information processing devices, just to name a few.