Photonic properties of silicon-coated colloidal monolayers
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The spectral dependence of the optical transmission through hexagonal monolayers of silica (a-SiO2) microspheres covered with different amounts of amorphous silicon (a-Si) is studied. The strong changes in the spectral transmissivity can be semi-quantitatively understood by the coupling of the incident electromagnetic field to photonic modes of the combined structure consisting of the hexagonal lattice of a-SiO2 microspheres and a-Si.
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