Design of a solid-state nanopore-based platform for single-molecule spectroscopy |
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Authors: | Hong Jongin Lee Yoonjae Chansin Guillaume A T Edel Joshua B Demello Andrew J |
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Affiliation: | Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, UK. |
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Abstract: | We numerically assess the light propagation and distribution characteristics of electromagnetic fields on nanopores formed in dielectric and metal/dielectric membranes using a frequency-domain finite element method (3D full-wave electromagnetic field simulation). Results of such studies were used to identify aluminum as an ideal material for use in optically thick metal/dielectric membranes. The comparison between SiN and Al/SiN membranes (with and without a submicron sized aperture) was numerically and experimentally shown to verify the effect of optically thick metal layers on light propagation and fluorescence excitation. The cut-off behavior for Al/SiN membranes with varying pore diameters was investigated in terms of light propagation, distribution of electromagnetic fields, and light attenuation characteristics. |
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