Project supported by the National Natural Science Foundation of China(Grant No.60708014);the Science Foundation for Postdoctorate of China(Grant No.2004035083);the Natural Science Foundation of Hunan Province of China(Grant No.06JJ2034);the Excellent Doctorate Dissertation Foundation of Central South University(Grant No.2008yb039);the Hunan Provincial Innovation Foundation for Postgraduate(Grant No.CX2009B029)
Based on the finite difference time domain method, we investigated theoretically the optical properties and the plasmonic interactions between a gold film perforated with periodic sub-wavelength holes and a thin gold ...