On-chip integration of metasurface-doublet for optical phased array with enhanced beam steering
Wang Zhizhang,
Ji Jitao,
Ye Xin,
Chen Yuxin,
Li Xueyun,
Song Wange,
Fang Bin,
Chen Ji,
Zhu Shining,
Li Tao
Affiliations
Wang Zhizhang
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, China
Ji Jitao
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, China
Ye Xin
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, China
Chen Yuxin
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, China
Li Xueyun
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, China
Song Wange
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, China
Fang Bin
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, China
Chen Ji
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, China
Zhu Shining
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, China
Li Tao
College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructure, Key Laboratory of Intelligent Optical Sensing and Manipulation, Jiangsu Key Laboratory of Artificial Functional Materials, Nanjing University, Nanjing, 210093, China
Optical phased array (OPA), as a promising beam steering technology, however, usually suffers from a narrow field of view (FOV) that limits its performances in applications. A miniaturized compact strategy to enlarge the beam steering angle is quite desirable for the solid-state OPA technique. Here an on-chip metasurface-doublet is proposed to offer angle magnification integrated with a port-selected optical phased array. It is implemented by combing convex and concave metalenses with the quadratic phase distribution, which is precisely integrated on the OPA chip by layer-by-layer fabrication process. Here, the OPA is fabricated in Lithium Niobate on Insulator (LNOI) platform. Our experiments show that the metasurface-doublet is able to achieve 1.54 times FOV amplification in a horizontal direction and with >41% working efficiency. Our results provide a feasible approach to achieve enlarged FOV for wide-angle beam steering and also imply a powerful platform in developing integrated multilayer metasurface devices.
