Dendritic optical antennas: Scattering properties and fluorescence enhancement

Author's Department

Physics Department

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https://doi.org/10.1038/s41598-017-05108-3

Document Type

Research Article

Publication Title

Scientific Reports

Publication Date

12-1-2017

doi

10.1038/s41598-017-05108-3

Abstract

© 2017 The Author(s). With the development of nanotechnologies, researchers have brought the concept of antenna to the optical regime for manipulation of nano-scaled light matter interactions. Most optical nanoantennas optimize optical function, but are not electrically connected. In order to realize functions that require electrical addressing, optical nanoantennas that are electrically continuous are desirable. In this article, we study the optical response of a type of electrically connected nanoantennas, which we propose to call "dendritic" antennas. While they are connected, they follow similar antenna hybridization trends to unconnected plasmon phased array antennas. The optical resonances supported by this type of nanoantennas are mapped both experimentally and theoretically to unravel their optical response. Photoluminescence measurements indicate a potential Purcell enhancement of more than a factor of 58.

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