Plasmonically induced transparent magnetic resonance in a metallic   metamaterial composed of asymmetric double bars
  We demonstrate that the trapped magnetic resonance mode can be induced in an asymmetric double-bar structure for electromagnetic waves normally incident onto the double-bar plane, which mode otherwise cannot be excited if the double bars are equal in length. By adjusting the structural geometry, the trapped magnetic resonance becomes transparent with little resonance absorption when it happens in the dipolar resonance regime, a phenomenon so-called plasmonic analogue of electromagnetically induced transparency. Accordingly, the additional magnetic resonance by introducing asymmetry is explained as a result of nonlinear plasmon coupling. 
Zheng-Gao Dong, Hui Liu, Tao Li, Shu-Ming Wang, Shi-Ning Zhu, and   Xiang Zhang
physics.optics cond-mat.mtrl-sci