Focal Intensity Distribution Manipulation with Huygens Metamirror

Huygens metasurface is new type of two-dimension metasurface composed of crossed electric and magnetic dipoles. Due to the outstanding merits, the proposed reflective Huygens metasurface is designed with 2π reflection phase range on condition that the reflection amplitude keeps above 0.99, and a multi-focus imaging Huygens metamirror is fist proposed. Compared with traditional imaging, Huygens metamirror can tailor the microwave to specified points, no matter the focal location, focal number or even the focal intensity distribution, adding a new degree of freedom to imaging manipulation. Our research offers a new method to the multi-focus imaging at microwave band and the Huygens metamirror offers the potential for applications in antenna and imaging system.