Directional out-coupling of light from a plasmonic nanowire-nanoparticle junction
Optics
2015-04-10 v1
Abstract
We experimentally show how a single Ag nanoparticle (NP) coupled to an Ag nanowire (NW) can convert propagating surface plasmon polaritons to directional photons. By employing dual-excitation Fourier microscopy with spatially filtered collection-optics, we show single- and dual-directional out-coupling of light from NW-NP junction for plasmons excited through glass-substrate and air-superstrate. Furthermore, we show NW-NP junction can influence the directionality of molecular-fluorescence emission, thus functioning as an optical antenna. The results discussed herein may have implications in realizing directional single-photon sources and quantum plasmon circuitry.
Keywords
Cite
@article{arxiv.1504.02201,
title = {Directional out-coupling of light from a plasmonic nanowire-nanoparticle junction},
author = {Danveer Singh and Arindam Dasgupta and Aswathy V. G. and Ravi Tripathi and G. V. Pavan Kumar},
journal= {arXiv preprint arXiv:1504.02201},
year = {2015}
}