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Giant nonlinear response at a plasmonic nanofocus drives efficient four-wave mixing

Title: Giant nonlinear response at a plasmonic nanofocus drives efficient four-wave mixing
Authors: Nielsen, MP
Shi, X
Dichtl, P
Maier, SA
Oulton, RF
Item Type: Journal Article
Abstract: Efficient optical frequency mixing typically must accumulate over large interaction lengths because nonlinear responses in natural materials are inherently weak. This limits the efficiency of mixing processes owing to the requirement of phase matching. Here, we report efficient four-wave mixing (FWM) over micrometer-scale interaction lengths at telecommunications wavelengths on silicon. We used an integrated plasmonic gap waveguide that strongly confines light within a nonlinear organic polymer. The gap waveguide intensifies light by nanofocusing it to a mode cross-section of a few tens of nanometers, thus generating a nonlinear response so strong that efficient FWM accumulates over wavelength-scale distances. This technique opens up nonlinear optics to a regime of relaxed phase matching, with the possibility of compact, broadband, and efficient frequency mixing integrated with silicon photonics.
Issue Date: 1-Dec-2017
Date of Acceptance: 26-Oct-2017
URI: http://hdl.handle.net/10044/1/55533
DOI: https://dx.doi.org/10.1126/science.aao1467
ISSN: 0036-8075
Publisher: American Association for the Advancement of Science
Start Page: 1179
End Page: 1181
Journal / Book Title: Science
Volume: 358
Issue: 6367
Copyright Statement: © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works http://www.sciencemag.org/about/science-licenses-journal-article-reuseThis is an article distributed under the terms of the Science Journals Default License.
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (E
The Leverhulme Trust
Funder's Grant Number: EP/I004343/1
EP/K503381/1
EP/M013812/1
RPG-2016-064
Keywords: Science & Technology
Multidisciplinary Sciences
Science & Technology - Other Topics
WAVE-GUIDES
SILICON-CHIP
PHASE
ENHANCEMENT
PROPAGATION
GENERATION
CONVERSION
MD Multidisciplinary
General Science & Technology
Publication Status: Published
Appears in Collections:Physics
Experimental Solid State
Faculty of Natural Sciences



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