太赫兹辐射
材料科学
光电子学
硅
光学
太赫兹光谱与技术
太赫兹超材料
超材料
远红外激光器
物理
激光器
作者
Jiu‐sheng Li,Chen Zhou
摘要
Terahertz waves have attracted considerable attention in recent years because of their potential applications in different fields. The appearance of a digital metasurface simplifies the design of functional devices and manipulates the terahertz wave in a convenient way with a specific array of digital particles. Metal resonators are mostly used in traditional structures, and the ohmic loss of metal will affect the energy transmission efficiency. In our work, we propose a silicon medium metasurface by pre-designing different digital sequences for terahertz wave different control functions such as anomalous reflection, beam splitting, diffuse scattering and generation of vortex beam. The far-field scattering patterns and near-field distribution are obtained by numerical simulation, which are in accordance with the values predicted analytically. Our work provides an effective method to promote the diversification of the metasurface-based functional devices in the terahertz region.
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