Extraordinary transmission caused by symmetry breaking
Optics
2012-07-17 v2
Abstract
The terahertz transmission properties of symmetrical and asymmetrical annular apertures arrays (AAAs) are investigated both experimentally and numerically. It is found that only odd order resonant modes are observed for the symmetrical structures but both odd and even order resonances can be shown for the asymmetrical structures. Breaking the symmetry of AAAs by gradually displacing the H-shaped AAAs to U-shaped AAAs allows an intensity modulation depth of 99% of the second order resonance. Simulation results verify the experimental conclusions well. This result provides a tremendous opportunity for terahertz wavelength tunable filtering, sensing, and near-field imaging.
Cite
@article{arxiv.1111.4367,
title = {Extraordinary transmission caused by symmetry breaking},
author = {Dan Hu and Changqing Xie and Ming Liu and Yan Zhang},
journal= {arXiv preprint arXiv:1111.4367},
year = {2012}
}
Comments
4 pages, 4 figures