METAMATERIAL FOR DIVERGING ELECTROMAGNETIC BEAM

摘要

Provided in the present invention is a metamaterial for diverging an electromagnetic beam. The metamaterial has attached to a substrate thereof two artificial microstructures. The direction of the optical axis of the first artificial microstructure is parallel to the direction of a first electric field. The direction of the optical axis of the second artificial microstructure is parallel to the direction of a second electric field. The metamaterial comprises a first region and a second region. Geometric dimensions of the first artificial microstructure are at maximum within the first region, and the geometric dimensions of the first artificial microstructure at all other regions increase continuously in the direction towards the first region. Geometric dimensions of the second artificial microstructure are at maximum within the second region, and the geometric dimension of the second artificial microstructure at all other regions increase continuously in the direction towards the second region. On the basis of a response of the artificial microstructures towards the electric fields, a principle related to the structure of the artificial microstructures, and the principle of electromagnetic wave deflection by non-uniform metamaterial, the metamaterial of the present invention allows for divergence of electromagnetic wave, for flexible control of the angle of emergence of the diverged electromagnetic beam, and for divergence of large-area electromagnetic beam.