Abstract
Metal hole arrays with submicrometer dimensions were fabricated by a two-step molding process that uses anodic porous alumina with ideally ordered hole configurations as a starting material. The obtained metal (Ni) hole arrays had geometrical structures identical to those of the original. Transmission spectra of Ni hole array membranes show the band-pass characteristic in the visible range. The cut-off wavelength in the long-wavelength region is dependent on the hole size.
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