A theoretical study of a compact and highly efficient isolator consisting of nonlinear plasma and matching metamaterials

摘要: A novel, compact and highly efficient electromagnetic wave isolator is investigated theoretically, acquired through a tunneling mechanism in epsilon-negative matching metamaterials. Nonreciprocal transmission properties are via the coupling together of evanescent propagation waves an asymmetric configuration, constituted nonlinear plasma alternated with metamaterial. Not only large contrast achieved, but also high forward realized. Taking four key factors into consideration, we designed multilayer structure, consisting five layers, to achieve desired unidirectional transmissions 0.839 contrast, 80% total 143.18 MW cm−2 working input intensity, at incident frequency 13.8 × 109 s−1, which represents better performance than was achieved some previous designs.