Time-varying metasurfaces for arbitrary parametric wave control

Abstract

Huygens' metasurfaces allow almost arbitrary wave-front shaping. However, it remains highly nontrivial to achieve dynamic and arbitrary control of the amplitude and phase response. Here we show that in a system consisting of both electric and magnetic meta-atoms with independently controlled modulation, the incident wave can be efficiently converted to sidebands of new frequencies, whose scattering directionality, phase and conversion efficiency can be manipulated almost arbitrarily. Show more