Abstract
The effect of asymmetry on extraordinary optical transmission (EOT) through arrays of triangular holes with acute angles was investigated using FDTD method. It was found that the transmissions are strongly dependent on the different linear polarizations of the incident electric field, and could be tuned by varying the asymmetry of arrays of triangular holes. It could be demonstrated that these properties were associated with the existence of channel plasmon-polaritons (CPPs), which make it possible to realize Fabry-Perot (FP) resonances inside the triangular holes. The results may be very useful for EOT applications which require high sensitivity on the polarization of the incident electric field and the shape of holes in the arrays.
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