Cascaded metasurfaces for dynamic control of THz wavefronts

Researchers have developed a general framework and metadevices for achieving dynamic control of THz wavefronts. Instead of locally controlling the individual meta-atoms in a THz metasurface (e.g., via PIN diode, varactor, etc.), they vary the polarization of a light beam with rotating multilayer cascaded metasurfaces.

source https://www.sciencedaily.com/releases/2021/07/210723121456.htm