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

Shouren Zhang; Ruibin Jiang; Ya-Ming Xie; Qifeng Ruan; Baocheng Yang; Jianfang Wang; Hai-Qing Lin

doi:10.1002/adma.201502917

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

Adv Mater. 2015 Dec 2;27(45):7432-9. doi: 10.1002/adma.201502917. Epub 2015 Oct 20.

Authors

Shouren Zhang^{1

2}, Ruibin Jiang², Ya-Ming Xie³, Qifeng Ruan², Baocheng Yang¹, Jianfang Wang², Hai-Qing Lin³

Affiliations

¹ Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, Henan, 450006, China.
² Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
³ Beijing Computational Science Research Center, Beijing, 100094, China.

PMID: 26484637
DOI: 10.1002/adma.201502917

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.

Keywords: Mie theory; forward scattering; magnetic resonance; metal oxides; nanoantennas.