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Optical Chirality from Dark-Field Illumination of Planar Plasmonic Nanostructures

Hwang, Yongsop; Hopkins, Ben; Wang, Dapeng; Mitchell, Arnan; Davis, Timothy J.; Lin, Jiao; Yuan, Xiao-Cong

Description

Dark-field illumination is shown to make planar chiral nanoparticle arrangements exhibit circular dichroism in extinction, analogous to true chiral scatterers. Single oligomers, consisting rotationally symmetric arrangements of gold nanorods, are experimentally observed to exhibit circular dichrosim at their maximum scattering with strong agreement to numerical simulation. A dipole model is developed to show that this effect is caused by a difference in the projection of a nanorod onto the...[Show more]

CollectionsANU Research Publications
Date published: 2017
Type: Journal article
URI: http://hdl.handle.net/1885/218289
Source: Laser and Photonics Reviews
DOI: 10.1002/lpor.201700216

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