Colloidal Moderate-Refractive-Index Cu₂O Nanospheres as Visible-Region Nanoantennas with Electromagnetic Resonance and Directional Light-Scattering Properties.
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.
Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, Henan, 450006, China.|Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
Shouren
S
Zhang
Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
Ruibin
R
Jiang
Beijing Computational Science Research Center, Beijing, 100094, China.
Ya-Ming
YM
Xie
Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
Qifeng
Q
Ruan
Institute of Nanostructured Functional Materials, Huanghe Science and Technology College, Zhengzhou, Henan, 450006, China.
Baocheng
B
Yang
Department of Physics, The Chinese University of Hong Kong, Shatin, Hong Kong SAR, China.
Jianfang
J
Wang
Beijing Computational Science Research Center, Beijing, 100094, China.
Hai-Qing
HQ
Lin
Mie theory; forward scattering; magnetic resonance; metal oxides; nanoantennas