Plasmonically induced transparent magnetic resonance in a metallic metamaterial composed of asymmetric double bars

Details Plasmonically induced transparent magnetic resonance in a metallic metamaterial composed of asymmetric double bars Plasmonically induced transparent magnetic resonance in a metallic metamaterial composed of asymmetric double bars

2011-01-04

arxiv.org/abs/1101.0739v1

Optics Express 18, 18229 (2010)

Physics

Optics

Scientific paper

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.

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