Quasi-coherent thermal emitter based on refractory plasmonic materials
Optics
2015-09-01 v1
Abstract
The thermal emission of refractory plasmonic metamaterial - a titanium nitride 1D grating - is studied at high operating temperature (540 {\deg}C). By choosing a refractory material, we fabricate thermal gratings with high brightness that are emitting mid-infrared radiation centered around 3 m. We demonstrate experimentally that the thermal excitation of plasmon-polariton on the surface of the grating produces a well-collimated beam with a spatial coherence length of 32{\lambda} (angular divergence of 1.8{\deg}) which is quasi-monochromatic with a full width at half maximum of 70 nm. These experimental results show good agreement with a numerical model based on a two-dimensional full-wave analysis in frequency domain.
Cite
@article{arxiv.1508.07335,
title = {Quasi-coherent thermal emitter based on refractory plasmonic materials},
author = {Jingjing Liu and Urcan Guler and Alexei Lagutchev and Alexander Kildishev and Oana Malis and Alexandra Boltasseva and Vladimir M. Shalaev},
journal= {arXiv preprint arXiv:1508.07335},
year = {2015}
}
Comments
10 pages, 5 figures