Bridging the gap between dielectric nanophotonics and the visible regime with effectively lossless gallium phosphide antennas

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Title: Bridging the gap between dielectric nanophotonics and the visible regime with effectively lossless gallium phosphide antennas
Authors: Cambiasso, J
Grinblat, G
Li, Y
Rakovich, A
Cortes, E
Maier, SA
Item Type: Journal Article
Abstract: We present all-dielectric gallium phosphide (GaP) nanoantennas as an efficient nanophotonic platform for surface-enhanced second harmonic generation (SHG) and fluorescence (SEF), showing negligible losses in the visible range. Employing single GaP nanodisks, we observe an increase of more than 3 orders of magnitude in the SHG conversion signal in comparison with the bulk. This constitutes an SHG efficiency as large as 0.0002%, which is to the best of our knowledge the highest yet achieved value for a single nano-object in the optical region. Furthermore, we show that GaP dimers with 35 nm gap can enhance up to 3600 times the fluorescence emission of dyes located in the gap of the nanoantenna. This is accomplished by a fluorescence lifetime reduction of at least 22 times, accompanied by a high-intensity field confinement in the gap region. These results open new avenues for low-loss nanophotonics in the optical regime.
Issue Date: 17-Jan-2017
Date of Acceptance: 16-Jan-2017
URI: http://hdl.handle.net/10044/1/45460
DOI: https://dx.doi.org/10.1021/acs.nanolett.6b05026
ISSN: 1530-6992
Publisher: American Chemical Society
Start Page: 1219
End Page: 1225
Journal / Book Title: Nano Letters
Volume: 17
Issue: 2
Copyright Statement: © 2017 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acs.nanolett.6b05026
Sponsor/Funder: Engineering & Physical Science Research Council (E
Office Of Naval Research (USA)
Royal Society
Funder's Grant Number: EP/M013812/1
N00014-16-1-2288
UF150542
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
Gallium phosphide
dielectric nanoantennas
second harmonic generation
fluorescence enhancement
Purcell effect
SURFACE-ENHANCED SPECTROSCOPIES
2ND-HARMONIC GENERATION
3RD-HARMONIC GENERATION
NANOPARTICLES DRIVEN
GOLD NANOPARTICLES
OPTICAL-PROPERTIES
RAMAN-SCATTERING
NANOANTENNAS
NANOSTRUCTURES
FLUORESCENCE
MD Multidisciplinary
Publication Status: Published
Appears in Collections:Physics
Experimental Solid State
Faculty of Natural Sciences



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