Figure 5.

Reflectance spectra of PSRFs and C-PSRFs. PSRFs' reflectance spectra (upper curve) etched with single periods of (a) 3.105, (b) 3.45, and (c) 4.14 s, respectively, and reflectance spectrum of C-PSRFs (lower curve) with three peaks etched with the coupled current density of three single periods of (a1) 3.105, (b1) 3.45, and (c1) 4.14 s. In both cases, the sinusoidal current varied between 10 and 50 mA cm-2 and was cycled 30 times.

Li et al. Nanoscale Research Letters 2012 7:79   doi:10.1186/1556-276X-7-79
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