Interference in edge-scattering from monocrystalline gold flakes [Invited]

We observe strongly dissimilar scattering from the two types of sidewall configurations (here referred to as “edges”) in hexagonal quasi-monocrystalline gold flakes with thicknesses around 1 micron. As the origin of the phenomena, we identify the interference between a direct, quasi-specular scatter...

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Bibliographic Details
Published inOptical materials express Vol. 8; no. 12; p. 3688
Main Authors Boroviks, Sergejs, Wolff, Christian, Linnet, Jes, Yang, Yuanqing, Todisco, Francesco, Roberts, Alexander S., Bozhevolnyi, Sergey I., Hecht, Bert, Mortensen, N. Asger
Format Journal Article
LanguageEnglish
Published Washington Optical Society of America 01.12.2018
Subjects
Chirality
Face centered cubic lattice
Flakes
Gold
Interference
Scattering
Thickness
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Summary:We observe strongly dissimilar scattering from the two types of sidewall configurations (here referred to as “edges”) in hexagonal quasi-monocrystalline gold flakes with thicknesses around 1 micron. As the origin of the phenomena, we identify the interference between a direct, quasi-specular scattering and an indirect scattering process involving an intermediate surface-plasmon state. The dissimilarity between the two types of edges is a direct consequence of the three-fold symmetry around the [111]-axis and the intrinsic chirality of a face-centered cubic lattice. We propose that this effect can be potentially used to estimate dielectric function of the monocrystalline gold.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.8.003688