Efficient Third Harmonic Generation from Metal-Dielectric Hybrid Nanoantennas

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Title: Efficient Third Harmonic Generation from Metal-Dielectric Hybrid Nanoantennas
Authors: Shibanuma, T
Grinblat, G
Albella, P
Maier, SA
Item Type: Journal Article
Abstract: High refractive index dielectric nanoantennas are expected to become key elements for nonlinear nano-optics applications due to their large nonlinearities, low energy losses, and ability to produce high electric field enhancements in relatively large nanoscale volumes. In this work, we show that the nonlinear response from a high-index dielectric nanoantenna can be significantly improved by adding a metallic component to build a metal–dielectric hybrid nanostructure. We demonstrate that the plasmonic resonance of a Au nanoring can boost the anapole mode supported by a Si nanodisk, strongly enhancing the electric field inside the large third-order susceptibility dielectric. As a result, a high third harmonic conversion efficiency, which reaches 0.007% at a third harmonic wavelength of 440 nm, is obtained. In addition, by suitably modifying geometrical parameters of the hybrid nanoantenna, we tune the enhanced third harmonic emission throughout the optical regime. Coupling metallic and dielectric nanoantennas to expand the potential of subwavelength structures opens new paths for efficient nonlinear optical effects in the visible range on the nanoscale.
Issue Date: 13-Mar-2017
Date of Acceptance: 7-Mar-2017
URI: http://hdl.handle.net/10044/1/47876
DOI: https://dx.doi.org/10.1021/acs.nanolett.7b00462
ISSN: 1530-6984
Publisher: American Chemical Society
Start Page: 2647
End Page: 2651
Journal / Book Title: NANO LETTERS
Volume: 17
Issue: 4
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.7b00462
Sponsor/Funder: The Leverhulme Trust
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (E
Office Of Naval Research (USA)
Funder's Grant Number: RPG-2014-018
EP/L024926/1
EP/M013812/1
N00014-16-1-2288
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
Metal-dielectric hybrid nanoantennas
third harmonic generation
electric field enhancement
anapole modes
SURFACE-ENHANCED SPECTROSCOPIES
3RD-HARMONIC GENERATION
NANOPARTICLES DRIVEN
GOLD NANOPARTICLES
MAGNETIC RESPONSE
FANO RESONANCES
ANAPOLE MODES
METAMATERIALS
PLASMONICS
SCATTERING
Metal−dielectric hybrid nanoantennas
MD Multidisciplinary
Publication Status: Published
Appears in Collections:Physics
Experimental Solid State
Faculty of Natural Sciences



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