Blackbody Metamaterial Composite Film of Nanoparticle and Polymer

Abstract

Blackbody metamaterial composite films of nanoparticles and polymer are presented both theoretically and experimentally. Reflectance, transmittance and absorption of the film are calculated on the basis of the Mie theory and Clausius–Mossotti relation, which is equivalent to the Maxwell Garnett theory, at various conditions. We also fabricated the composite metamaterials in which gold nanospherical particles are dispersed in a polyvinylpyrrolidone film. Although the experimental results are in agreement with the calculated spectra in the composite of binary gold nanoparticles with different sizes, the results are somewhat deviated from the calculated spectra of the composite of single-element gold nanoparticles. This may be due to aggregation of the gold nanoparticles at high volume fraction.