Open AccessQuasi-omnidirectional total light absorption in nanostructured gold surfaces
Author(s) -
Hanbin Zheng,
Renaud A. L. Vallée,
Rui M. Almeida,
T. Rivera,
Serge Ravaine
Publication year - 2014
Publication title -
optical materials express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 66
ISSN - 2159-3930
DOI - 10.1364/ome.4.001236
Subject(s) - materials science , optics , omnidirectional antenna , absorption (acoustics) , optoelectronics , nanotechnology , composite material , telecommunications , physics , computer science , antenna (radio)
7 pagesInternational audienceTheoretical 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°