Strong absorption and selective thermal emission from a mid-infrared metamaterial

Details Strong absorption and selective thermal emission from a mid-infrared metamaterial Strong absorption and selective thermal emission from a mid-infrared metamaterial

2011-04-14

arxiv.org/abs/1104.2945v1

Appl. Phys. Lett., 98 (2011) 241105

Physics

Optics

The following article has been submitted to Appl. Phys. Lett. After it is published, it will be found at http://apl.aip.org/.

Scientific paper

10.1063/1.3600779

We demonstrate thin-film metamaterials with resonances in the mid-infrared wavelength range. Our structures are numerically modeled and experimentally characterized by reflection and angularly-resolved thermal emission spectroscopy. We demonstrate strong and controllable absorption resonances across the mid-infrared wavelength range. In addition, the polarized thermal emission from these samples is shown to be highly selective and largely independent of emission angles from normal to 45 degrees. Experimental results are compared to numerical models with excellent agreement. Such structures hold promise for large-area, low-cost metamaterial coatings for control of gray- or black-body thermal signatures, as well as for possible mid-IR sensing applications.

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