Visible transmission through metal-coated colloidal crystals |
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Authors: | Zhi-Bing Wang Yong-Hong Ye Yu-An Zhang and Jia-Yu Zhang |
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Institution: | (1) Department of Electronic Engineering, Southeast University, Nanjing, 210096, People’s Republic of China;(2) Department of Physics, Nanjing Normal University, Nanjing, 210097, People’s Republic of China |
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Abstract: | Large-scale periodically structured metal films with enhanced optical transmission in visible frequencies were fabricated
by depositing silver onto colloidal crystals. The obtained transmission properties are similar to those observed through periodical
hole arrays in planar metal films. We have experimentally observed two enhanced transmission pass bands in visible frequencies
in these metal films due to the excitation of surface plasmon polaritons. The peak positions of the pass bands depend on the
size of the colloidal spheres. The transmission spectra highly depend on the incident angle for p-polarized light but are
weak for s-polarized light. Our fabrication method provides a promising approach for the fabrication of large-scale low-cost
plasmonic crystals with submicrometer periodicity. |
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Keywords: | PACS" target="_blank">PACS 73 20 Mf 81 16 Dn 42 70 Qs |
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