Abstract
We herein report a numerical investigation of dual plasmon induced transparency (PIT) effect in two-dimensional plasmonic metamaterials composed of two C-shaped resonators and one U-shaped resonator. The finite difference time domain (FDTD) method is herein introduced to analyze transmission properties and electromagnetic field distributions of certain resonance wavelengths. It was found that, the PIT spectral response was affected by parameters of plasmonic metamaterials, such as the widths of C-shaped resonator and U-shaped resonator, and edge-to-edge distance between the adjacent resonators. The dual PIT effect can be attributed to the near field coupling between the dark and bright modes. The plasmonic nanostructures can provide useful guidelines for dual PIT effect in metamaterials, to support applications in selective storage, bio-chemical nanosensors, plasmonic-based all-optical information processing and optical switches.
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