极化(电化学)
振幅
各向同性
波前
干扰(通信)
光学
各向异性
相(物质)
相位控制
超材料
太赫兹辐射
相干控制
光电子学
物理
材料科学
计算机科学
激光器
电信
化学
物理化学
频道(广播)
量子力学
作者
Chunxue Xiong,Xueqian Zhang,Quan Xu,Zhibo Yao,Shoujun Zhang,Tong Wu,Xieyu Chen,Yuehong Xu,Li Niu,Jiaguang Han,Weili Zhang
摘要
Extending the optical control capabilities of metasurfaces for broader functionalities has recently attracted extensive attention. Simultaneously achieving amplitude and phase control is an effective route as it allows rebuilding the full information of the field. However, related previous studies mostly rely on anisotropic meta-atoms, which restrict the available incident polarizations. Here, a polarization-insensitive amplitude and phase control method is proposed and experimentally demonstrated in the terahertz regime, which is actualized by introducing interference effect in reflective-type meta-molecules composed of isotropic meta-atoms. Two kinds of functional meta-mirror devices, i.e., multi-order meta-gratings and multi-focal meta-lenses, are designed and characterized, where the results verify this method very well. This proposed method further enriches the routes to control amplitude and phase and may also find broad applications in realizing flexible wavefront control devices with complex functionalities.
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