Narrow band absorber based on a dielectric nanodisk array on silver film
作者： F Callewaert , S Chen , S Butun , K Aydin
DOI: 10.1088/2040-8978/18/7/075006
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摘要: The simulations of normally incident visible light absorption in a periodic array dielectric nanodisks on the top silver film are presented. Electromagnetic indicate narrow resonances with intensities as large 95%. enhancement due to can be high factor 30 compared an equivalent mirror. A parametric study shows that resonance characteristics and number modes easily tuned controlled by refractive index geometric parameters nanodisks. In particular, structure have either single or two peaks. main peaks described detail using simulated electric field profiles dispersion relation. Proposed narrowband absorber design utilizing continuous metal films nanostructured arrays could used for narrow-band filters, refractive-index based biosensing applications thermal emitters.
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