Superposition Behavior in Babinet's Effect on the Nano Au Particles Patterns
S-C Wu, C-F Chen, W-C Chao and H-L Chen
National Nano Device Laboratories, TW
Keywords: Babinet's effect, left handed meta-material, nano Au particles, transmission enhanced
The individual Babinet effect  in two types of complementary patterns can be added on a composed pattern mixed both patterns under the FTIR (Fourier Transform Infer-Red) spectroscopy measuring. That is the Babinet spectrum on both kind of patterns can be added together on one mixed pattern that shows the superposition behavior. These two types of complementary patterns are Split Ring Resonator (SRR) and wire array (CLS Capacitively Loaded Strip) respectively. The mixed pattern is associated with SRR and wire array, which is so called the LHM (Left Handed Meta-material) pattern . Those samples are fabricated on Si wafer with standard IC (Integrated Circuit) processes . The metal conductors on the pattern surface are made of nano gold particles. The positive one is a sample with periodic conducting wire on the Si wafer, which patched with nano Au particles. And the negative one is adopted the reverse way; the wire part is an empty of Au, whereas the surrounding space is filled with Au particles. From the spectrum, the transmittance-enhanced behavior  is also found out obviously. The surface plasmon resonated effect  of Au nano particle on top pattern surface is supposed one of the attribution factors. We explain the combining effects at both the response of metamaterial pattern and the collective surface plasmon effect of the nano particles.
Nanotech 2004 Conference Technical Program Abstract