Alternative approach to all-angle negative refraction in two-dimensional photonic crystals
Abstract
We show that with an appropriate surface modification, a slab of photonic crystal can be made to allow wave transmission within the band gap. Furthermore, negative refraction and all-angle-negative-refraction (AANR) can be achieved by this surface modification in frequency windows that were not realized before in two-dimensional photonic crystals [C. Luo et al, Phys. Rev. B 65, 201104 (2002)]. This approach to AANR leads to new applications in flat lens imaging. Previous flat lens using photonic crystals requires object-image distance u+v less than or equal to the lens thickness d, u+v d. Our approach can be used to design flat lens with u+v=sd with s>>1, thus being able to image large and/or far away objects. Our results are confirmed by FDTD simulations.
Cite
@article{arxiv.cond-mat/0703733,
title = {Alternative approach to all-angle negative refraction in two-dimensional photonic crystals},
author = {Y. J. Huang and W. T. Lu and S. Sridhar},
journal= {arXiv preprint arXiv:cond-mat/0703733},
year = {2011}
}
Comments
5 pages, 9 eps figs in RevTex format