Abstract

In this Letter, we demonstrate experimentally that a patchwork of four metal–insulator–metal patches leads to an unpolarized wideband omnidirectional infrared absorption. Our structure absorbs 70% of the incident light on a 2.5 μm bandwidth at 8.5 μm. It paves the way to the design of wideband efficient plasmonic absorbers in the infrared spectrum.

©2012 Optical Society of America

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