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The concentration of electromagnetic waves (EM) is of utmost importance inmany engineering applications such as solar-cells. According to thetransformation optics (TO) methodology, a feasible approach for obtainingarbitrary shape concentrators is proposed. In contrary to the previous works,the obtained materials are homogeneous and independent of the concentratorshape. That is regardless of the input geometry always one constant material,which is optic-null medium (ONM), is used and the performance of device willnot alter. This competency will ease the design process and circumvent thesophisticated calculations of the necessitating materials. To authenticate theconcept, several numerical full-wave simulations were performed for differentshape concentrators. It was observed that numerical results exhibit strongagreement with the theoretical investigations and corroborate the generalityand effectiveness of the proposed designing method.

Geometry free materials enabled by transformation optics for enhancing the intensity of electromagnetic waves in an arbitrary domain