Open AccessTwo-dimensional angularly selective optical properties of gold nanoshell with holes
Author(s) -
Jun Qian,
Zongqiang Chen,
Jing Chen,
Yudong Li,
Jingjun Xu,
Qian Sun
Publication year - 2012
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.014614
Subject(s) - nanoshell , optics , materials science , discrete dipole approximation , asymmetry , polarization (electrochemistry) , nanostructure , extinction (optical mineralogy) , metamaterial , dipole , nanoparticle , surface plasmon resonance , plasmon , condensed matter physics , molecular physics , physics , scattering , nanotechnology , chemistry , quantum mechanics
We studied the optical extinction properties of Au nanoshell with two holes by the discrete-dipole approximation method. We found that the extinction spectra of the nanoparticles are sensitive to the angle between the polarization vector of the incident light and either symmetrical axis of the hole on nanoshell and also the sizes of two holes. The nanostructure we proposed provides the additional dimensional angularly selectivity of the optical properties and the plasmon resonances redshift comparing with the nanocup. In addition, the conception of the "two-dimensional" symmetry breaking of the nanoparticle is suggested which can induce the two-dimensional spatial asymmetry of optical properties of nanoparticles.