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

Sergejs Boroviks, Christian Wolff, Jes Linnet, Yuanqing Yang, Francesco Todisco, Alexander S. Roberts, Sergey I. Bozhevolnyi, Bert Hecht, N. Asger Mortensen

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Abstract

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.
Original languageEnglish
JournalOptical Materials Express
Volume8
Issue number12
Pages (from-to)3688-3697
ISSN2159-3930
DOIs
Publication statusPublished - 1. Dec 2018

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