Directed diffraction without negative refraction
Materials Science
2009-11-10 v1
Abstract
Using the FDTD method, we investigate the electromagnetic propagation in two-dimensional photonic crystals, formed by parallel air cylinders in a dielectric medium. The corresponding frequency band structure is computed using the standard plane-wave expansion method. It is shown that within partial bandgaps, waves tend to bend away from the forbidden directions. This phenomenon perhaps need not be explained in terms of negative refraction or `superlensing' behavior, contrast to what has been conjectured.
Cite
@article{arxiv.cond-mat/0312582,
title = {Directed diffraction without negative refraction},
author = {Hung-Ta Chien and Hui-Ting Tang and Chao-Hsien Kuo and Chii-Chang Chen and Zhen Ye},
journal= {arXiv preprint arXiv:cond-mat/0312582},
year = {2009}
}
Comments
3 pages, 4 figures