A feasible approach to field concentrators of arbitrary shapes
We propose a simple method to design field concentrators of arbitrary shapes based on Fabry–Pérot resonances. The material parameters are feasible in terms of metallic layered structures and gradient index dielectrics. The functionalities are well confirmed by numerical simulations.
Keywordsfield concentrator Fabry–Pérot resonance transformation optics
PACS numbers42.25.Bs 41.20.-q 42.25.-p
This work was supported by the Fundamental Research Funds for the Central Universities (Grant No. 20720170015) and the National Natural Science Foundation of China for Excellent Young Scientists (Grant No. 61322504).