Figure 1

Broadband Plasmonic Absorber.

(a) Schematic representation of the broadband plasmonic absorber. The absorber consists of a nanostructured membrane suspended onto a thermally isolating o-ring (right). The geometrical details of the multilayer plasmonic absorber membrane are shown on the left; (b) upper panel: scanning electron micrograph from the top surface of a fabricated absorber (left, scale-bar 200 nm) and an image from an absorbing membrane suspended on an o-ring (right). Lower panel: absorption spectrum of the broadband plasmonic absorber. Red curve: absorption spectrum measured from a micrometer-scale area free of fabrication imperfections; black curve: absorption spectrum measured from a large, nanostructured area which includes standard fabrication imperfections; the green square represents the absorption at the used excitation laser wavelength.