A programmable metasurface with dynamic polarization, scattering and focusing control

Diverse electromagnetic (EM) responses of a programmable metasurface with a relatively large scale have been investigated, where multiple functionalities are obtained on the same surface. The unit cell in the metasurface is integrated with one PIN diode, and thus a binary coded phase is realized for a single polarization. Exploiting this anisotropic characteristic, reconfigurable polarization conversion is presented first. Then the dynamic scattering performance for two kinds of sources, i.e. a plane wave and a point source, is carefully elaborated. To tailor the scattering properties, genetic algorithm, normally based on binary coding, is coupled with the scattering pattern analysis to optimize the coding…

• NN
  National Natural Science Foundation of China

  Awards: KGD080914002, 61471389, 61501494, 61271100
• TN
  Tsinghua National Laboratory for Information Science and Technology
• AF
  Air Force Engineering University