Individual plasmonic helix for probing light chirality
Optics
2019-08-06 v1
Abstract
We investigate the plasmonic nanohelix as an individual subwavelength element for locally probing light chirality. We show that an hybrid nanoantenna combining a carbon-gold core-shell helix and a plasmonic nanoaperture transmits circularly polarized light with the same handedness as the helix and blocks the other. Such an assymmetric response is spatially localized, spectrally broadband and background-free. Finally, we demonstrate the possibility to engineer an individual plasmonic helix at the apex of a sharp tip typically used in scanning near-field microscopies, thus opening the prospect of moveable local probes for high resolution sensing and mapping of light chirality and chiroptical forces
Keywords
Cite
@article{arxiv.1908.01157,
title = {Individual plasmonic helix for probing light chirality},
author = {Mengjia Wang and Roland Salut and Miguel Angel Suarez and Nicolas Martin and Thierry Grosjean},
journal= {arXiv preprint arXiv:1908.01157},
year = {2019}
}