Fluctuational electrodynamics of hyperbolic metamaterials
Abstract
We give a detailed account of equilibrium and non-equilibrium fluctuational electrodynamics of hyperbolic metamaterials. We show the unifying aspects of two different approaches; one utilizes the second kind of fluctuation dissipation theorem and the other makes use of the scattering method. We analyze the near-field of hyperbolic media at finite temperatures and show that the lack of spatial coherence can be attributed to the multi-modal nature of super-Planckian thermal emission. We also adopt the analysis to phonon-polaritonic super-lattice metamaterials and describe the regimes suitable for experimental verification of our predicted effects. The results reveal that far-field thermal emission spectra are dominated by epsilon-near-zero and epsilon-near-pole responses as expected from Kirchoff's laws. Our work should aid both theorists and experimentalists to study complex media and engineer equilibrium and non-equilibrium fluctuations for applications in thermal photonics.
Cite
@article{arxiv.1406.3791,
title = {Fluctuational electrodynamics of hyperbolic metamaterials},
author = {Yu Guo and Zubin Jacob},
journal= {arXiv preprint arXiv:1406.3791},
year = {2015}
}
Comments
13 pages, 8 figures