Temporal coupled-mode theory for Fano resonance in light scattering by a single obstacle
Abstract
We present a theory for Fano interference in light scattering by individual obstacle, based on a temporal coupled-mode formalism. This theory is applicable for obstacles that are much smaller than the incident wavelength, or for systems with two-dimensional cylindrical or three-dimensional spherical symmetry. We show that for each angle momentum channel, the Fano interference effect can be modeled by a simple temporal coupled-mode equation, which provides a line shape formula for scattering and absorption cross-section. We validate the analysis with numerical simulations. As an application of the theory, we design a structure that exhibits strong absorption and weak scattering properties at the same frequency.
Keywords
Cite
@article{arxiv.0909.3323,
title = {Temporal coupled-mode theory for Fano resonance in light scattering by a single obstacle},
author = {Zhichao Ruan and Shanhui Fan},
journal= {arXiv preprint arXiv:0909.3323},
year = {2009}
}
Comments
Journal of Physical Chemistry C (in press)