Plasmonic ratchet wheels: Switching circular dichroism by arranging chiral nanostructures

V. K. Valev, N. Smisdom, A. V. Silhanek, B. De Clercq, W. Gillijns, M. Ameloot, V. V. Moshchalkov, T. Verbiest

Research output: Contribution to journalArticlepeer-review

176 Citations (Scopus)

Abstract

We demonstrate circular dichrolsm (CD) in the second harmonic generation (SHG) signal from chiral assemblies of G-shaped nanostructures made of gold. The arrangement of the G shapes is crucial since upon reordering them the SHG-CD effect disappears. Microscopy reveals SHG "hotspots" assemblies, which originate in enantiomerically sensitive plasmon modes, having the novel property of exhibiting a chiral geometry themselves in relation with the handedness of the material. These results open new frontiers in studying chirality.

Original languageEnglish
Pages (from-to)3945-3948
Number of pages4
JournalNano Letters
Volume9
Issue number11
DOIs
Publication statusPublished - 11 Dec 2009

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