Wavefront-controllable all-silicon terahertz meta-polarizer [波前可控的全硅太赫兹超构起偏器]

作者：Li J.; Yue Z.; Li J.; Zheng C.; Liu J.; Yang F.; Li H.; Zhang Y.; Zhang Y.; Yao J.

来源：Science China-Materials, 2023, 66(1): 300-308.

DOI：10.1007/s40843-022-2126-0

• meta-polarizer
• terahertz
• unpolarized wave
• wavefront manipulation

Metamaterial devices that can directly generate polarized waves from unpolarized waves and simultaneously manipulate the wavefront are needed for advanced optical applications. However, conventional wavefront-controllable polarization conversion metasurfaces (PCMs) rely on an incident wave with a certain polarization state rather than an unpolarized wave. A few specially designed meta-polarizers had obtained polarized waves from unpolarized waves, but the simultaneous wavefront manipulation was not achieved. In this work, we report wavefront-controllable terahertz (THz) meta-polarizers based on all-silicon materials, which have higher integration characteristics than conventional meta-polarizers and wavefront-controllable PCMs. Such THz meta-polarizers merge the desired phase profile into meta-atoms’ beam interference, and will perform direct generation of polarized waves from unpolarized waves and realize simultaneous wavefront manipulations. This work is expected to provide a new impact for THz wave manipulations. [Figure not available: see fulltext.].

• 单位
  首都师范大学; 天津大学