Plasmonic beaming and active control over fluorescent emission
Open Access
- 19 April 2011
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 2 (1), 283
- https://doi.org/10.1038/ncomms1286
Abstract
Nanometallic optical antennas are rapidly gaining popularity in applications that require exquisite control over light concentration and emission processes. The search is on for high-performance antennas that offer facile integration on chips. Here we demonstrate a new, easily fabricated optical antenna design that achieves an unprecedented level of control over fluorescent emission by combining concepts from plasmonics, radiative decay engineering and optical beaming. The antenna consists of a nanoscale plasmonic cavity filled with quantum dots coupled to a miniature grating structure that can be engineered to produce one or more highly collimated beams. Electromagnetic simulations and confocal microscopy were used to visualize the beaming process. The metals defining the plasmonic cavity can be utilized to electrically control the emission intensity and wavelength. These findings facilitate the realization of a new class of active optical antennas for use in new optical sources and a wide range of nanoscale optical spectroscopy applications.This publication has 43 references indexed in Scilit:
- Controlling Light Localization and Light–Matter Interactions with NanoplasmonicsSmall, 2010
- Unidirectional Emission of a Quantum Dot Coupled to a NanoantennaScience, 2010
- Large single-molecule fluorescence enhancements produced by a bowtie nanoantennaNature Photonics, 2009
- Optical AntennasAdvances in Optics and Photonics, 2009
- Optical antennas direct single-molecule emissionNature Photonics, 2008
- Strong Enhancement of the Radiative Decay Rate of Emitters by Single Plasmonic NanoantennasNano Letters, 2007
- Enhancement of Single-Molecule Fluorescence Using a Gold Nanoparticle as an Optical NanoantennaPhysical Review Letters, 2006
- Enhancement and Quenching of Single-Molecule FluorescencePhysical Review Letters, 2006
- Resonant Optical AntennasScience, 2005
- Beaming Light from a Subwavelength ApertureScience, 2002