Colloidal Moderate-Refractive-Index Cu₂O Nanospheres as Visible-Region Nanoantennas with Electromagnetic Resonance and Directional Light-Scattering Properties.

Zhang, Shouren; Jiang, Ruibin; Xie, Ya-Ming; Ruan, Qifeng; Yang, Baocheng; Wang, Jianfang; Lin, Hai-Qing · Adv Mater · 2015

basic_science · Level V

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Abstract

Moderate-refractive-index dielectric nano-spheres are found to possess strong electric and magnetic dipole resonances in the visible region. Owing to the overlap of the electric and magnetic dipole resonances, moderate-refractive-index dielectric nanospheres exhibit directional forward scattering at the strongest scattering peak. Such directional scattering is experimentally observed on colloidal Cu2O nanospheres, which are readily prepared through wet-chemistry methods.