609691.fig.002a
(a)
609691.fig.002b
(b)
609691.fig.002c
(c)
Figure 2: The calculated transmission spectrums for (a) , (b) , together with (c) curves obtained by the simulated transmission data. The arrows in Figure 2 denoted that the resonance wavelengths shifted to longer wavelength when the refractive index of the surrounding medium was increased from 1.312 to 1.352.