All-Solid-State Optical Phased Arrays of Mid-Infrared Based Graphene-Metal Hybrid Metasurfaces

被引:5
|
作者
Wang, Yue [1 ,2 ]
Wang, Yu [1 ]
Yang, Guohui [3 ]
Li, Qingyan [1 ]
Zhang, Yu [1 ]
Yan, Shiyu [1 ]
Wang, Chunhui [1 ,2 ]
机构
[1] Harbin Inst Technol, Natl Key Lab Tunable Laser Technol, Harbin 150001, Peoples R China
[2] Shenzhen Glint Inst AI & Robot, Shenzhen 518057, Peoples R China
[3] Harbin Inst Technol, Sch Elect & Informat Engn, Harbin 150001, Peoples R China
基金
中国国家自然科学基金;
关键词
optical phased arrays; graphene; metasurface; beam steering; DUAL-BAND; POLARIZATION; METAMATERIAL; ABSORPTION; HOLOGRAMS;
D O I
10.3390/nano11061552
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Optical phased arrays (OPAs) are essential optical elements in applications that require the ability to manipulate the light-wavefront, such as beam focusing and light steering. To miniaturize the optical components, active metasurfaces, especially graphene metasurfaces, are used as competent alternatives. However, the metasurface cannot achieve strong resonance effect and phase control function in the mid-infrared region only relying on a single-layer graphene. Here we present a graphene-metal hybrid metasurface that can generate a specific phase or a continuous sweep in the range of a 275 degrees-based single-layer graphene structure. A key feature of our design is that the phase adjustment mainly depends on the combination mechanism of resonance intensity and frequency modulation. An all-solid-state, electrically tunable, and reflective OPA is designed by applying the bias voltage to a different pixel metasurface. The simulation results show that the maximum deflection angle of the OPA can reach 42.716 degrees, and the angular resolution can reach 0.62 degrees. This design can be widely applied to mid-infrared imaging, optical sensing, and optical communication systems.
引用
收藏
页数:12
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