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Published in

Optica, Optical Materials Express, 6(4), p. 1236, 2014

DOI: 10.1364/ome.4.001236

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Quasi-omnidirectional total light absorption in nanostructured gold surfaces

Journal article published in 2014 by Hanbin Zheng, Renaud Vallée, Rui M. Almeida, Thomas Rivera ORCID, Serge Ravaine
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Theoretical calculations have predicted the possibility of omnidirectional absorption on a metallic surface with a closed packed layer of voids/spheres buried just beneath the surface. We have carried out a series of experiments to verify the existence of this theoretically predicted phenomenon. We report the observation of quasi omnidirectional total absorption of light on our fabricated surfaces and the tunability of the absorption wavelength by varying the size of the spheres/pores. The strongly enhanced absorption is observed for angles of incidence up to 65°.