Optical surface edge Bloch modes: low-loss subwavelength-scale 2D light localization
Optics
2015-06-05 v2
Abstract
Edge modes of a finite-size woodpile can appear within a complete bandgap on an <010> edge. The mode area is as small as 0.066 squared half-in-vacuum-wavelengths, and the propagation loss is small. The field maxima occur at a dielectric-vacuum interface, like at a metal-dielectric interface for surface plasmon modes. The edge mode is a subwavelength-scale 2D light localization mode in non-metallic materials. Analysis of two-mode co-directional coupling between identical surface Bloch modes suggests that a large photonic crystal or surface designing would be needed for suppressing the evanescent field coupling in the woodpile.
Keywords
Cite
@article{arxiv.1206.4342,
title = {Optical surface edge Bloch modes: low-loss subwavelength-scale 2D light localization},
author = {Shu-Yu Su and Tomoyuki Yoshie},
journal= {arXiv preprint arXiv:1206.4342},
year = {2015}
}