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arXiv · 1206.4342

Optical surface edge Bloch modes: low-loss subwavelength-scale 2D light localization

Shu-Yu Su·Tomoyuki Yoshie
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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.

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Shu-Yu Su, Tomoyuki Yoshie. 2012-07-27. Optical surface edge Bloch modes: low-loss subwavelength-scale 2D light localization. https://doi.org/10.1364/ol.37.004398

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