Broadband optical magnetism in chiral metallic nanohole arrays by shadowing vapor deposition
arXiv:1501.07682 · doi:10.1063/1.4972789
Abstract
We show that broadband optical magnetism can be achieved through incorporating multi-scaled 3D metallic meta-elements into Z-shaped nanohole arrays. The broadband effect arises from the excitation of multiple magnetic resonances in the meta-elements at different wavelengths. Moreover, the nanohole arrays exhibit a large transmission difference for left- and right-handed circularly polarized incident light due to the chiral arrangement of the meta-elements. More importantly, we have realized experimentally the broadband behavior for the optical range in Ag nanohole arrays fabricated by using a shadowing vapor deposition method. Our study opens up new opportunities for achieving broadband artificial magnetism at visible frequencies which allows possible applications in plasmonic bio-sensors or energy concentrators.
5 pages, 4 figures
References in corpus (6)
- Ultra-broadband Light Absorption by a Sawtooth Anisotropic Metamaterial Slab
- Magnetic metamaterials at telecommunication and visible frequencies
- Dynamical Theory of Artificial Optical Magnetism Produced by Rings of Plasmonic Nanoparticles
- Multi-spectral near perfect metamaterial absorbers using spatially multiplexed plasmon resonance metal square structures
- Design of Metamaterial Surfaces with Broad-band Absorbance
- Plasmonic ultra-broadband polarizers based on Ag nano wire-slit arrays