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arXiv · 1508.07335

Quasi-coherent thermal emitter based on refractory plasmonic materials

Jingjing Liu·Urcan Guler·Alexei Lagutchev·Alexander Kildishev·Oana Malis·Alexandra Boltasseva·Vladimir M. Shalaev
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Abstract

The thermal emission of refractory plasmonic metamaterial - a titanium nitride 1D grating - is studied at high operating temperature (540 °C). By choosing a refractory material, we fabricate thermal gratings with high brightness that are emitting mid-infrared radiation centered around 3 $μ$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 32λ (angular divergence of 1.8°) 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.

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Jingjing Liu, Urcan Guler, Alexei Lagutchev, Alexander Kildishev, Oana Malis, Alexandra Boltasseva, Vladimir M. Shalaev. 2015-08-28. Quasi-coherent thermal emitter based on refractory plasmonic materials. https://arxiv.org/abs/1508.07335

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